SAEED MDCAT
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The components of cells including its organelles can be separated by a process called:
Gel electrophoresis is a technique used to separate charged biological molecules like DNA, RNA AND proteins.X-ray diffraction is the experimental science determining the atomic and molecular structure of a crystal.Cell fractionation is the process used to separate cellular components while preserving individual functions of each component.
Gel electrophoresis is a technique used to separate charged biological molecules like DNA, RNA AND proteins.X-ray diffraction is the experimental science determining the atomic and molecular structure of a crystal.Cell fractionation is the process used to separate cellular components while preserving individual functions of each component.
Gel electrophoresis is a technique used to separate charged biological molecules like DNA, RNA AND proteins.X-ray diffraction is the experimental science determining the atomic and molecular structure of a crystal.Cell fractionation is the process used to separate cellular components while preserving individual functions of each component.
The cells of plants and animals can be distinguished by the presence or absence of:
Cell wall is present in plant cells while absent in animal cells.
Cell wall is present in plant cells while absent in animal cells.
Cell wall is present in plant cells while absent in animal cells.
A structure that is commonly present in both plant and animal cells is:
Centrioles are present in animal cells while absent in plant cells.Glyoxisomes are present in plant seedlings while absent in animal cells.Lysosomes are absent in plant cells while present in animal cells.
Centrioles are present in animal cells while absent in plant cells.Glyoxisomes are present in plant seedlings while absent in animal cells.Lysosomes are absent in plant cells while present in animal cells.
Centrioles are present in animal cells while absent in plant cells.Glyoxisomes are present in plant seedlings while absent in animal cells.Lysosomes are absent in plant cells while present in animal cells.
Which of the following structures is not found in an animal cell?
Plasmodesmata are found in plant cells only. These are connections/ protoplasmic extensions between adjacent plant cells for transportation.
Plasmodesmata are found in plant cells only. These are connections/ protoplasmic extensions between adjacent plant cells for transportation.
Plasmodesmata are found in plant cells only. These are connections/ protoplasmic extensions between adjacent plant cells for transportation.
___________ is the smallest unit that can carry out all activities of life.
Cell is the basic structural and functional unit of life. Organelle is a sub cellular entity and particular organelle can carry out specific functions.
Cell is the basic structural and functional unit of life. Organelle is a sub cellular entity and particular organelle can carry out specific functions.
Cell is the basic structural and functional unit of life. Organelle is a sub cellular entity and particular organelle can carry out specific functions.
Phagocytosis is the common character of:
Plant cells and bacterial cells usually do not show phagocytosis due to presence of cell wall.
Plant cells and bacterial cells usually do not show phagocytosis due to presence of cell wall.
Plant cells and bacterial cells usually do not show phagocytosis due to presence of cell wall.
A human cheek cell and a spongy mesophyll cell from a leaf are examined under a microscope. The structures observed common in both are:
Cell membrane, nucleus and cytoplasm → Present in bothCytoplasm, cell wall and cell membrane → Cheek cells do not have cell wallCell wall, cell membrane and nucleus → Cheek cells do not have cell wallNucleus, cytoplasm and cell wall → Cheek cells do not have cell wall
Cell membrane, nucleus and cytoplasm → Present in bothCytoplasm, cell wall and cell membrane → Cheek cells do not have cell wallCell wall, cell membrane and nucleus → Cheek cells do not have cell wallNucleus, cytoplasm and cell wall → Cheek cells do not have cell wall
Cell membrane, nucleus and cytoplasm → Present in bothCytoplasm, cell wall and cell membrane → Cheek cells do not have cell wallCell wall, cell membrane and nucleus → Cheek cells do not have cell wallNucleus, cytoplasm and cell wall → Cheek cells do not have cell wall
Which one of the following is not found in animal cell?
Chloroplasts are found in plant cells and are involved in photosynthesis.
Chloroplasts are found in plant cells and are involved in photosynthesis.
Chloroplasts are found in plant cells and are involved in photosynthesis.
Which of the following structures is not found in an animal cell?
Plasmodesmata are found in plant cells only. These are connections/protoplasmic extensions between adjacent plant cells for transportation.
Plasmodesmata are found in plant cells only. These are connections/protoplasmic extensions between adjacent plant cells for transportation.
Plasmodesmata are found in plant cells only. These are connections/protoplasmic extensions between adjacent plant cells for transportation.
In case of plant cells, nucleus is pushed towards periphery due to the presence of:
Mature plant cell has large central vacuole which pushes nucleus to periphery.
Mature plant cell has large central vacuole which pushes nucleus to periphery.
Mature plant cell has large central vacuole which pushes nucleus to periphery.
In fungi, cell wall is composed of _________, while in bacteria, it is composed of_____________, respectively.
In different organisms, the cell wall is composed of different chemicals. For example, fungal cell wall is composed of chitin, bacterial cell wall is composed of peptidoglycan/murein and plant cell wall mainly composed of cellulose.
In different organisms, the cell wall is composed of different chemicals. For example, fungal cell wall is composed of chitin, bacterial cell wall is composed of peptidoglycan/murein and plant cell wall mainly composed of cellulose.
In different organisms, the cell wall is composed of different chemicals. For example, fungal cell wall is composed of chitin, bacterial cell wall is composed of peptidoglycan/murein and plant cell wall mainly composed of cellulose.
In cell wall, _________ molecules are arranged in criss cross arrangement.
Most abundant components of plasma membrane are:
Proteins: 60-80%Lipids: 20-40%Carbohydrates: Small amount
Proteins: 60-80%Lipids: 20-40%Carbohydrates: Small amount
Proteins: 60-80%Lipids: 20-40%Carbohydrates: Small amount
Which of the following would be least likely to diffuse through a lipid bilayer?
Only lipid soluble substances can cross lipid bilayer. For charged particles, plasma membrane has protein channels.
Only lipid soluble substances can cross lipid bilayer. For charged particles, plasma membrane has protein channels.
Only lipid soluble substances can cross lipid bilayer. For charged particles, plasma membrane has protein channels.
_____________ is the outermost boundary of most of the plant cells.
Cell membrane is next to cell wall in plant cells. Capsule is usually present around bacterial cells.
Cell membrane is next to cell wall in plant cells. Capsule is usually present around bacterial cells.
Cell membrane is next to cell wall in plant cells. Capsule is usually present around bacterial cells.
Transport of materials through charged pores of plasma membrane occurs by:
Gates are involved in passive transport.Pumps are involved in active transport.
Gates are involved in passive transport.Pumps are involved in active transport.
Gates are involved in passive transport.Pumps are involved in active transport.
Which of the following forms extracellular matrix of a cell?
Substances found outside plasma membrane constitute extracellular matrix like glycoproteins and glycolipids.
Substances found outside plasma membrane constitute extracellular matrix like glycoproteins and glycolipids.
Substances found outside plasma membrane constitute extracellular matrix like glycoproteins and glycolipids.
Movement of water molecules from high water potential to low water potential across membrane is:
Diffusion is the passive movement of substances with or without membrane while osmosis is only related to passive movement of water molecules and always occurs across a membrane.
Diffusion is the passive movement of substances with or without membrane while osmosis is only related to passive movement of water molecules and always occurs across a membrane.
Diffusion is the passive movement of substances with or without membrane while osmosis is only related to passive movement of water molecules and always occurs across a membrane.
The concentration of potassium ions in a red blood cell is much higher than it is in the surrounding blood plasma, yet potassium ions continue to move into the cell. The process by which potassium ions move into the cell is called:
Movement from low to high concentration is called active transport.
Movement from low to high concentration is called active transport.
Movement from low to high concentration is called active transport.
Lipid molecules of plasma membrane are arranged in ___________ manner.
Explanation
Explanation
Explanation
Consider a protein that is synthesized on the rough endoplasmic reticulum. Which of the following location is not a possible final destination for this protein?
Most of the proteins synthesized on RER are transported extracellularly, while most of the proteins synthesized on free ribosomes work intra-cellularly.
Most of the proteins synthesized on RER are transported extracellularly, while most of the proteins synthesized on free ribosomes work intra-cellularly.
Most of the proteins synthesized on RER are transported extracellularly, while most of the proteins synthesized on free ribosomes work intra-cellularly.
Endoplasmic reticulum contains a system of flattened membrane-bounded sacs which are named as:
Cristae and elementary /F1 particles are associated with mitochondria.Suicidal bags are another term used for lysosomes.
Cristae and elementary /F1 particles are associated with mitochondria.Suicidal bags are another term used for lysosomes.
Cristae and elementary /F1 particles are associated with mitochondria.Suicidal bags are another term used for lysosomes.
Lysosomal enzymes are synthesized by:
These enzymes are formed on RER and then processed and secreted from Golgi apparatus.
These enzymes are formed on RER and then processed and secreted from Golgi apparatus.
These enzymes are formed on RER and then processed and secreted from Golgi apparatus.
In plants, __________ is the major contributor to the turgor that provides support for the individual plant cell.
The plant vacuole is the major contributor to the turgor that provides support for the individual plant cell and contributes to the turgidity of the leaves and younger parts of the plants.
The plant vacuole is the major contributor to the turgor that provides support for the individual plant cell and contributes to the turgidity of the leaves and younger parts of the plants.
The plant vacuole is the major contributor to the turgor that provides support for the individual plant cell and contributes to the turgidity of the leaves and younger parts of the plants.
Cisternae are the membranes associated with all of the following except:
Ribosomes are non-membranous.
Ribosomes are non-membranous.
Ribosomes are non-membranous.
The larger subunit of a eukaryotic ribosome sediments at:
Which organelle covers main space of the cell?
ER is network of channels extending throughout cytoplasm.
ER is network of channels extending throughout cytoplasm.
ER is network of channels extending throughout cytoplasm.
Golgi complex consist of:
Golgi bodies (cisternae) together with associated vesicles are called Golgi complex.
Golgi bodies (cisternae) together with associated vesicles are called Golgi complex.
Golgi bodies (cisternae) together with associated vesicles are called Golgi complex.
Cell having secretory function have abundant:
Secretory cells have abundant Golgi bodies. Dictyosomes are another name used for Golgi apparatus in plants.
Secretory cells have abundant Golgi bodies. Dictyosomes are another name used for Golgi apparatus in plants.
Secretory cells have abundant Golgi bodies. Dictyosomes are another name used for Golgi apparatus in plants.
It is an example of secondary lysosome:
Primary lysosome is fused with food vacuole and forms digestive vacuole. This digestive vacuole is called secondary lysosome.
Primary lysosome is fused with food vacuole and forms digestive vacuole. This digestive vacuole is called secondary lysosome.
Primary lysosome is fused with food vacuole and forms digestive vacuole. This digestive vacuole is called secondary lysosome.
Mitochondria is a semi-autonomous organelle because it contains:
Mitochondria can perform certain activities independently due to the presence of DNA, RNA and ribosomes.
Mitochondria can perform certain activities independently due to the presence of DNA, RNA and ribosomes.
Mitochondria can perform certain activities independently due to the presence of DNA, RNA and ribosomes.
Outer and inner membranes of mitochondria are:
The outer membrane has many protein-based pores that are big enough to allow the passage of ions and molecules as large as a small protein. In contrast, the inner membrane has much more restricted permeability, much like the plasma membrane of a cell.
The outer membrane has many protein-based pores that are big enough to allow the passage of ions and molecules as large as a small protein. In contrast, the inner membrane has much more restricted permeability, much like the plasma membrane of a cell.
The outer membrane has many protein-based pores that are big enough to allow the passage of ions and molecules as large as a small protein. In contrast, the inner membrane has much more restricted permeability, much like the plasma membrane of a cell.
Central dogma for genes expression of mitochondrial DNA occurs in:
Transcription and translation both in mitochondria occur in mitochondrial matrix.
Transcription and translation both in mitochondria occur in mitochondrial matrix.
Transcription and translation both in mitochondria occur in mitochondrial matrix.
Reactions of Krebs cycle occur in/at _____________ of mitochondria.
Krebs cycle is associated with mitochondrial matrix also called as inner compartment.
Krebs cycle is associated with mitochondrial matrix also called as inner compartment.
Krebs cycle is associated with mitochondrial matrix also called as inner compartment.
The size and number of mitochondria depends on cell’s:
Most active cell in our body is liver cell having about 1000 mitochondria per cell.
Most active cell in our body is liver cell having about 1000 mitochondria per cell.
Most active cell in our body is liver cell having about 1000 mitochondria per cell.
Under compound microscope, mitochondria look like all except:
When seen under compound microscope they appear as vesicles, rods, filaments.
When seen under compound microscope they appear as vesicles, rods, filaments.
When seen under compound microscope they appear as vesicles, rods, filaments.
It is mismatched with reference to mitochondrial membrane:
Chemiosmosis is associated with inner mitochondrial membrane. Outer membrane is smooth. Inner membrane forms infoldings which increase surface area and also have F1 particles.
Chemiosmosis is associated with inner mitochondrial membrane. Outer membrane is smooth. Inner membrane forms infoldings which increase surface area and also have F1 particles.
Chemiosmosis is associated with inner mitochondrial membrane. Outer membrane is smooth. Inner membrane forms infoldings which increase surface area and also have F1 particles.
Chemiosmosis is associated with inner mitochondrial membrane. Outer membrane is smooth. Inner membrane forms infoldings which increase surface area and also have F1 particles.
The organelle, which acts as factory of sugar synthesis:
In a eukaryotic cell the site of photosynthesis is chloroplast which is involved in the synthesis of carbohydrates
In a eukaryotic cell the site of photosynthesis is chloroplast which is involved in the synthesis of carbohydrates
In a eukaryotic cell the site of photosynthesis is chloroplast which is involved in the synthesis of carbohydrates
In a eukaryotic cell the site of photosynthesis is chloroplast which is involved in the synthesis of carbohydrates.
If we separate the cell organelles of a living cell, then which part can be alive?
Chloroplast is semi-autonomous due to presence of DNA.
Chloroplast is semi-autonomous due to presence of DNA.
Chloroplast is semi-autonomous due to presence of DNA.
Pick an incorrect statement about chloroplast:
Chloroplast is a double membranous organelle, present only in eukaryotic photosynthetic organisms and absent in prokaryotic photosynthetic organisms.
Chloroplast is a double membranous organelle, present only in eukaryotic photosynthetic organisms and absent in prokaryotic photosynthetic organisms.
Chloroplast is a double membranous organelle, present only in eukaryotic photosynthetic organisms and absent in prokaryotic photosynthetic organisms.
Nuclear pores regulate transport of substances between nucleoplasm and cytoplasm. Substances that enter in nucleus are:
RNAs and ribosomal subunits are synthesized within nucleus and then move outside.
RNAs and ribosomal subunits are synthesized within nucleus and then move outside.
RNAs and ribosomal subunits are synthesized within nucleus and then move outside.
Which of the following cannot be termed as ‘mono-nucleate’?
Erythroblasts are immature RBCs having single nucleus.Osteoblasts are bone cells having single nucleus.Leukocytes have single nucleus which can be lobed or spherical.Platelets are non-nucleated structures.
Erythroblasts are immature RBCs having single nucleus.Osteoblasts are bone cells having single nucleus.Leukocytes have single nucleus which can be lobed or spherical.Platelets are non-nucleated structures.
Erythroblasts are immature RBCs having single nucleus.Osteoblasts are bone cells having single nucleus.Leukocytes have single nucleus which can be lobed or spherical.Platelets are non-nucleated structures.
It is not a property of nuclear membrane:
All cellular membranes are permeable to water as per water potential
All cellular membranes are permeable to water as per water potential
All cellular membranes are permeable to water as per water potential
Large molecular weight rRNA and rDNA are present in which part of nucleolus:
Nucleolus is composed of two regions: peripheral granular area containing precursors for ribosomal subunits and central fibril area containing RNA and rDNA.
Nucleolus is composed of two regions: peripheral granular area containing precursors for ribosomal subunits and central fibril area containing RNA and rDNA.
Nucleolus is composed of two regions: peripheral granular area containing precursors for ribosomal subunits and central fibril area containing RNA and rDNA.
All of the following are not visible during dividing phase in a frog’s skin cell except:
Nucleus and nucleoli disappear during cell division.Chromatin is condensed to form chromosome.
Nucleus and nucleoli disappear during cell division.Chromatin is condensed to form chromosome.
Nucleus and nucleoli disappear during cell division.Chromatin is condensed to form chromosome.
A prokaryotic cell divides by:
Mitosis and meiosis are found in eukaryotic cells. Multiple fission is also shown by eukaryotic cells. Binary fission is simple division of a cell into two.
Mitosis and meiosis are found in eukaryotic cells. Multiple fission is also shown by eukaryotic cells. Binary fission is simple division of a cell into two.
Mitosis and meiosis are found in eukaryotic cells. Multiple fission is also shown by eukaryotic cells. Binary fission is simple division of a cell into two.
In peptidoglycan cell wall of a bacterial cell, polysaccharide chains are bound to short chains of amino acids through:
What is the similarity between prokaryotic and eukaryotic cell?
Eukaryotic flagella are made up of tubulin protein while prokaryotic is of flagellin protein.Eukaryotic cell wall is made up of cellulose (plant) while prokaryotic is of peptidoglycan.Prokaryotic cell membrane does not have sterols in it, while eukaryotic have.Ribosomes are made up of equal amount of proteins and rRNA in both.
Eukaryotic flagella are made up of tubulin protein while prokaryotic is of flagellin protein.Eukaryotic cell wall is made up of cellulose (plant) while prokaryotic is of peptidoglycan.Prokaryotic cell membrane does not have sterols in it, while eukaryotic have.Ribosomes are made up of equal amount of proteins and rRNA in both.
Eukaryotic flagella are made up of tubulin protein while prokaryotic is of flagellin protein.Eukaryotic cell wall is made up of cellulose (plant) while prokaryotic is of peptidoglycan.Prokaryotic cell membrane does not have sterols in it, while eukaryotic have.Ribosomes are made up of equal amount of proteins and rRNA in both.
Regarding cytoplasm of bacterial cell, this is not true:
Bacterial cytoplasm is throughout gel like so peripheral parts are also gel like.It contains chromatin body and multiple plasmids which are all circular DNA molecules.
Bacterial cytoplasm is throughout gel like so peripheral parts are also gel like.It contains chromatin body and multiple plasmids which are all circular DNA molecules.
Bacterial cytoplasm is throughout gel like so peripheral parts are also gel like.It contains chromatin body and multiple plasmids which are all circular DNA molecules.
Mycoplasma is:
It is a wall-less bacterium and all bacteria are prokaryotes and unicellular.
It is a wall-less bacterium and all bacteria are prokaryotes and unicellular.
It is a wall-less bacterium and all bacteria are prokaryotes and unicellular.
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Nice work by saed mdcat. It is most easiest way for those students who can’t join physical sessions. For me it is the best platform to prepare for test.keep it up saedmdcat.Allah bless all your team.
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