1071 + Interview Questions in CELL IN GENERAL AWARENESS Page 13 InterviewSolution

601.	Prokaryotic cells are haploid. Is it so ?
Answer» Correct Answer - Yes.

Discussion

602.	Nucleolus is the site for the synthesis ofA. RibosomeB. mRNAC. tRNAD. DNA
Answer» Correct Answer - A

Discussion

603.	This part of the cell is known as control unit of the cell A) Nucleus B) Chloroplast C) Mitochondria D) Vacuole
Answer» Correct option is A) Nucleus

Discussion

604.	The tips of chromosomes are known asA. telomeresB. centromereC. chromomereD. none of these
Answer» Correct Answer - A

Discussion

605.	A haploid set of chromosomes is calledA. geneB. genomeC. granaD. nucleoplasm
Answer» Correct Answer - B

Discussion

606.	These organelle of the cell play an important role in protein synthesis ? A) Lysosomes B) Nucleus C) Ribosomes D) Mitochondria
Answer» C) Ribosomes

Discussion

607.	What is the site of protein synthesis in the cell?
Answer» Ribosomes is the site of protein synthesis in the cell?

Discussion

608.	The tips of chromosomes are known asA. centromereB. genomeC. telomereD. karyotype
Answer» Correct Answer - C

Discussion

609.	The stretches of DNA which carry information for protein synthesis are calledA. nucleolusB. genomeC. centriolesD. centromere
Answer» Correct Answer - B

Discussion

610.	Majority of the chloroplasts of the green plants are found in theA. Mesophyll cellsB. Bundle sheath cellsC. Cortical cellsD. Epidermal cells
Answer» Correct Answer - A Majority of the chloroplasts of the green plants are found in the mesophyll cells.

Discussion

611.	Assertion. Chloroplasts have evolved from blue-green algae. Reason. Both have similar DNA and ribosomes.A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.C. If Assertion is true but Reason is false.D. If both Assertion and Reason are false.
Answer» Correct Answer - A

Discussion

612.	Give two alternative names for cell membrane.
Answer» Plasma membrane, Plasmalemma.

Discussion

613.	What does the abbreviation RME represent ?
Answer» Receptor-mediated endocytoiss.

Discussion

614.	Give an example of the smallest cell.
Answer» Pleuropneumonia-like organisms (PPLO)

Discussion

615.	Name the scientist who are credited with cell theory.
Answer» Schleiden and Schwann.

Discussion

616.	What is an osmotically active solution ?
Answer» A solution which draws water into it by osmoiss.

Discussion

617.	(a) How would you differentate primary lysosomes, secondary lysosomes, residual bodies and autophagic (b) From where do lysosomes arise ? (c) Name three kinds of lysosomes present in plants. What do they contain besides digestive enzymes ?
Answer» (a) A newly formed lysosome containing hydrolytic enzymes is called primary lysosome. Secondary lysosome contains hydrolytic enzymes and some digestible material. A secondary lysosome, after digestion of matter. Contains indigestible matter. Such a lysosome is called residual body. At times, primary lysosome fuses with damaged or unwanted organelles, forming a large sac called autophagic vacuole. (b) Lysosome arise from the Golgi complex. (c) Three kinds of plant lysosomes are spherosomes, aleurone grain and vacuoles. These also contain reverse food materials.

Discussion

618.	What is an interphase cell ?
Answer» A cell not undergoing diviison.

Discussion

619.	Name the direct cytoplasm-to-cytoplasm contacts in animal and plant cells.
Answer» Gap junctions, plasmodesmata.

Discussion

620.	Which cells have cell wall around them.
Answer» Prokaryotic, fungal and plant.

Discussion

621.	Match the columns I, II and choose the correct combinatioins from the option given A. (a-N), (b-L), (c-K), (d-M)B. (a-K), (b-M), (c-K), (d-L)C. (a-N), (b-M), (c-K), (d-L)D. (a-K), (b-L), (c-N), (d-M)
Answer» Correct Answer - C `{:(a,"Mycoplasma",N.,0.3mum),(b.,"RBCs",M.,7mu),(c.,"Bacteria",K., "3 to 5"mu),(d.,"Typical eukaryotic cell",L., "10 to 20"mum):}`

Discussion

622.	Cell is an open dynamic system. Is it correct ?
Answer» Correct Answer - Yes.

Discussion

623.	Explain the association of carbohydrate to the plasma membrane and its significance.
Answer» Sugar residues or carbohydrates attaches either with proteins or lipids usually making UP less than 10% of the membrane weight, they can give rise to a wide variety of structures in relatively short chains. They give individual cell types a distinguishing features. Therefore, they may be involved in. Cell Recognition e.g., surface of RBC have carbohydrates arranged in branched chains: differences in the arrangement give rise to different blood group antigens (i.e., AB and 0). Cell surface differences are also responsible for the specificity of action of cells with hormones, drugs, viruses or bacteria. The cause of cell surface differences is related to characteristic surface due to carbohydrate component.

Discussion

624.	According to the find mosaic model , the quasi-fluid nature of lipid enables lateral movement of protein within the overall, lipid bilayer. This ability to move a within the membrane is measured as itsA. MobilityB. FluidityC. MovabilityD. All of the above.
Answer» Correct Answer - B According to the fluid mosaic model, the quasi-fluid nature of lipid enables lateral movement of protein within the overall, lipid bilayer. This ability to move within the membrance is measured as its fluidilty.

Discussion

625.	In what respect the fluid mosaic theory of cell membrane resembles the lamellar theories ?
Answer» In having phospholipid bilayer between two protein monolayers, and in thickness.

Discussion

626.	Keeping in view the fluid mosaic model for the stucture of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid mono layer to the other (described as flip flop movement)A. Both lipids and proteins can flip-flopB. While lipids can rarely flip-flop , proteins cannotC. While proteins can flip-flop , lipids cannotD. Neither lipids , nor proteins can flip-flop
Answer» Correct Answer - B Mobility of membrane proteins due to the fluid property of lipid bilayer was demonstrated by classical experiment of D Frye and M Edidin(1970) Lipid mole cules very rarely migrate fromone lipid monolayer co other monolayer of lipid biomolecular layer such a type of movement is called flip-flop or ransbilayer movement and occurs once a month forany individual lipid molecule. But protein can never perform flip-flop movement.

Discussion

627.	Cell recognition and adhesion are facilitated by components of plasma membrane. These components are generallyA. Protein molecules aloneB. Lipid molecules aloneC. Both lipid and protein moleculesD. Glycolipids and glycoproteins
Answer» Correct Answer - D

Discussion

628.	Components of the eukaryotic plasma membrane areA. Protein and liqidsB. Protein and carbohydratesC. Lipids (20-79%), proteins (20-70%), oligosaccharides (1-5%), and water (20%)D. Lipids (20-70%), proteins (20-79%), proteins (20-70%), carbohydrates (1-5%) and DNA
Answer» Correct Answer - C

Discussion

629.	Actin fiber is present inA. CiliaB. FlagellaC. CarbohydratesD. Microfilaments
Answer» Correct Answer - D

Discussion

630.	Which of the following cells do not show DNA duplication or RNA sythesis ?A. Liver cellsB. Muscle cellsC. Nerver cellsD. Mature RBCs
Answer» Correct Answer - D

Discussion

631.	Meiosis can be observed inA. Tapetal cellsB. MegasporeseC. MicropresD. Spore mother cells
Answer» Correct Answer - D

Discussion

632.	Who proposed for the first time that cells are totipotent ?A. HaberlandtB. MaheshwariC. StewardD. White
Answer» Correct Answer - A

Discussion

633.	The surface-to-volume ratio of a cellA. Remains constantB. Decreases with increasing sizeC. Increases with increasing sizeD. Both (2) and (3)
Answer» Correct Answer - B

Discussion

634.	The main function of plasma membrane is toA. Store cell materialB. Control all cellular activitiesC. Maintain cell shape and sizeD. Regulatdhe inflow and outflow of material through the cell wall
Answer» Correct Answer - D

Discussion

635.	Carrier proteins are involved inA. Transport of enzymesB. Water transportC. Active transport of ionsD. Passive transport of gases
Answer» Correct Answer - C

Discussion

636.	Peroxisomes contain peroxide-producing enzymes. These are found inA. Plant cellsB. Animal cellsC. Both (1) and (2)D. Bacteria and blue green algae
Answer» Correct Answer - C

Discussion

637.	Non-secretory proteins are synthesized byA. ER-bound ribosomesB. Free ribosomesC. PolysomesD. Endosomes
Answer» Correct Answer - B

Discussion

638.	Telomerase is an enzyme which is aA. RNAB. RibonucleoproteinC. Repetitive DNAD. Simple protein
Answer» Correct Answer - A

Discussion

639.	Telomerase is an enzyme which is aA. Simple proteinB. RNAC. FibonucleoprotemD. Repetitive DNA
Answer» Correct Answer - C

Discussion

640.	In a cell membrane, integral proteins areA. partially or totally buried in the membraneB. partially attached to the surfaec of the membraneC. permanently attached to the outer surface of the membraneD. temporarily attached to the surface of the membrane
Answer» Correct Answer - A

Discussion

641.	Membrane-bound ribosomes are involved in the synthesis ofA. secretory proteinsB. peroxisomal proteinsC. nuclear proteinsD. mitochondrial proteins
Answer» Correct Answer - A

Discussion

642.	Which of the following are not membrane bound ?A. MesosomeB. VacuolesC. RibosomesD. Lysosomes
Answer» Correct Answer - C

Discussion

643.	Define Isotonic Solution.
Answer» Isotonic Solution : When the concentration of the solution outside the cell is equal to the concentration of cytoplasm of the cell, it is called as isotonic solution.

643.

Define Isotonic Solution.

Answer»

Isotonic Solution :

When the concentration of the solution outside the cell is equal to the concentration of cytoplasm of the cell, it is called as isotonic solution.

Discussion

644.	What happens if plasma membrane ruptures or breaks?
Answer» Cell membrane or plasma membrane is covering of the animal cell. It separate cytoplasm from the external environment. It defined the shape and size of the cell. It plays a crucial role in maintaining a balance of various substances inside the cell. It controls the exchange of substances between the cell and its external environment. If it ruptured or broke, then the above activities will stop, the cell will die.

Discussion

645.	What is the difference between diffusion and osmosis ?
Answer» Diffusion : Movement of solutes or ions from higher concentration to lower concentration is called as diffusion. It does not require energy therefore, it is called as passive transport. Osmosis : The movement of solvent or water from higher concentration (solvent) to lower concentration (solvent) through a semipermeable membrane is called as osmosis Or the movement of solvent or water from lower concentration to higher concentration of solution through a semipermeable membrane is called as osmosis.

645.

What is the difference between diffusion and osmosis ?

Answer»

Diffusion : Movement of solutes or ions from higher concentration to lower concentration is called as diffusion. It does not require energy therefore, it is called as passive transport.

Osmosis : The movement of solvent or water from higher concentration (solvent) to lower concentration (solvent) through a semipermeable membrane is called as osmosis Or the movement of solvent or water from lower concentration to higher concentration of solution through a semipermeable membrane is called as osmosis.

Discussion

646.	State any two function of Plasma Membrane ?
Answer» Functions of Plasma Membrane : (a) It regulates the movement of molecules inside and outside the cell. (b) It helps in maintaining the distinct composition of the cell.

646.

State any two function of Plasma Membrane ?

Answer»

Functions of Plasma Membrane :

(a) It regulates the movement of molecules inside and outside the cell.

(b) It helps in maintaining the distinct composition of the cell.

Discussion

647.	Define Cell size.
Answer» Cell Size : Size of cell is variable depending upon the type of organism. Some are microscopic while some are visible with naked eyes. Their size may vary from 0.2 mm to 18 cm. • Size of a typical cell in a multicellular organism ranges from 20-30 mm. • The largest cell is ostrich egg (15 cm in diameter with shell & 8 cm in diameter without cell). • The longest cell is nerve cell (upto 1 m or more). • Smallest cells so far known are PPLOs e.g., mycoplasma (0.1 mm in diameter). • Human egg is 0.1 mm in diameter.

647.

Define Cell size.

Answer»

Cell Size :

Size of cell is variable depending upon the type of organism. Some are microscopic while some are visible with naked eyes. Their size may vary from 0.2 mm to 18 cm.

• Size of a typical cell in a multicellular organism ranges from 20-30 mm.

• The largest cell is ostrich egg (15 cm in diameter with shell & 8 cm in diameter without cell).

• The longest cell is nerve cell (upto 1 m or more).

• Smallest cells so far known are PPLOs e.g., mycoplasma (0.1 mm in diameter).

• Human egg is 0.1 mm in diameter.

Discussion

648.	Define Cell organelles.
Answer» There is an occurrence of division of labour within a cell as they all got certain specific components called ‘Cell organelles’. Each of them perform a specific function. The three basic components of all the cells are : (i) Plasma membrane (ii) Nucleus (iii) Cytoplasm

648.

Define Cell organelles.

Answer»

There is an occurrence of division of labour within a cell as they all got certain specific components called ‘Cell organelles’. Each of them perform a specific function.

The three basic components of all the cells are :

(i) Plasma membrane

(ii) Nucleus

(iii) Cytoplasm

Discussion

649.	Define Cell Membrane.
Answer» Cell Membrane : (a) Cell membrane is also called as plasma membrane or plasma lemma. (b) It is the limiting boundary of each cell which separates the cytoplasm from its surroundings. (c) It is found in both plant as well as animal cells. (d) It is the outermost covering of a cell in case of animals and lies below the cell wall in case of plants. (e) It is made up of proteins and lipids where proteins are sandwiched between bilayer of lipids. (f) Plasma membrane is selectively permeable in nature. It allows or permits the entry and exit of some materials in and out of the cell. (g) Singer and Nicholson gave the fluid mosaic model of plasma membrane. According to them, it consists of a protein layer sandwiched between two layers of lipids. It is in quasifluid state. It is 75A thick. (h) It is flexible and can be folded, broken and reunited.

649.

Define Cell Membrane.

Answer»

Cell Membrane :

(a) Cell membrane is also called as plasma membrane or plasma lemma.

(b) It is the limiting boundary of each cell which separates the cytoplasm from its surroundings.

(c) It is found in both plant as well as animal cells.

(d) It is the outermost covering of a cell in case of animals and lies below the cell wall in case of plants.

(e) It is made up of proteins and lipids where proteins are sandwiched between bilayer of lipids.

(f) Plasma membrane is selectively permeable in nature. It allows or permits the entry and exit of some materials in and out of the cell.

(g) Singer and Nicholson gave the fluid mosaic model of plasma membrane. According to them, it consists of a protein layer sandwiched between two layers of lipids. It is in quasifluid state. It is 75A thick.

(h) It is flexible and can be folded, broken and reunited.

Discussion

650.	Golgi apparatus/apparato reticulare is specialized for all exceptA. Glycosidation and glycosylation oflipids and proteinsB. Recycling of the plasma membrane pinched off by pi- nocytosis and phagocytosisC. SecretionD. Intracellular digestion
Answer» Correct Answer - D

Discussion

Explore topic-wise InterviewSolutions in .

Prokaryotic cells are haploid. Is it so ?

Nucleolus is the site for the synthesis ofA. RibosomeB. mRNAC. tRNAD. DNA

This part of the cell is known as control unit of the cell A) Nucleus B) Chloroplast C) Mitochondria D) Vacuole

The tips of chromosomes are known asA. telomeresB. centromereC. chromomereD. none of these

A haploid set of chromosomes is calledA. geneB. genomeC. granaD. nucleoplasm

These organelle of the cell play an important role in protein synthesis ? A) Lysosomes B) Nucleus C) Ribosomes D) Mitochondria

What is the site of protein synthesis in the cell?

The tips of chromosomes are known asA. centromereB. genomeC. telomereD. karyotype

The stretches of DNA which carry information for protein synthesis are calledA. nucleolusB. genomeC. centriolesD. centromere

Majority of the chloroplasts of the green plants are found in theA. Mesophyll cellsB. Bundle sheath cellsC. Cortical cellsD. Epidermal cells

Give two alternative names for cell membrane.

What does the abbreviation RME represent ?

Give an example of the smallest cell.

Name the scientist who are credited with cell theory.

What is an osmotically active solution ?

(a) How would you differentate primary lysosomes, secondary lysosomes, residual bodies and autophagic (b) From where do lysosomes arise ? (c) Name three kinds of lysosomes present in plants. What do they contain besides digestive enzymes ?

What is an interphase cell ?

Name the direct cytoplasm-to-cytoplasm contacts in animal and plant cells.

Which cells have cell wall around them.

Match the columns I, II and choose the correct combinatioins from the option given A. (a-N), (b-L), (c-K), (d-M)B. (a-K), (b-M), (c-K), (d-L)C. (a-N), (b-M), (c-K), (d-L)D. (a-K), (b-L), (c-N), (d-M)

Cell is an open dynamic system. Is it correct ?

Explain the association of carbohydrate to the plasma membrane and its significance.

According to the find mosaic model , the quasi-fluid nature of lipid enables lateral movement of protein within the overall, lipid bilayer. This ability to move a within the membrane is measured as itsA. MobilityB. FluidityC. MovabilityD. All of the above.

In what respect the fluid mosaic theory of cell membrane resembles the lamellar theories ?

Cell recognition and adhesion are facilitated by components of plasma membrane. These components are generallyA. Protein molecules aloneB. Lipid molecules aloneC. Both lipid and protein moleculesD. Glycolipids and glycoproteins

Components of the eukaryotic plasma membrane areA. Protein and liqidsB. Protein and carbohydratesC. Lipids (20-79%), proteins (20-70%), oligosaccharides (1-5%), and water (20%)D. Lipids (20-70%), proteins (20-79%), proteins (20-70%), carbohydrates (1-5%) and DNA

Actin fiber is present inA. CiliaB. FlagellaC. CarbohydratesD. Microfilaments

Which of the following cells do not show DNA duplication or RNA sythesis ?A. Liver cellsB. Muscle cellsC. Nerver cellsD. Mature RBCs

Meiosis can be observed inA. Tapetal cellsB. MegasporeseC. MicropresD. Spore mother cells

Who proposed for the first time that cells are totipotent ?A. HaberlandtB. MaheshwariC. StewardD. White

The surface-to-volume ratio of a cellA. Remains constantB. Decreases with increasing sizeC. Increases with increasing sizeD. Both (2) and (3)

The main function of plasma membrane is toA. Store cell materialB. Control all cellular activitiesC. Maintain cell shape and sizeD. Regulatdhe inflow and outflow of material through the cell wall

Carrier proteins are involved inA. Transport of enzymesB. Water transportC. Active transport of ionsD. Passive transport of gases

Peroxisomes contain peroxide-producing enzymes. These are found inA. Plant cellsB. Animal cellsC. Both (1) and (2)D. Bacteria and blue green algae

Non-secretory proteins are synthesized byA. ER-bound ribosomesB. Free ribosomesC. PolysomesD. Endosomes

Telomerase is an enzyme which is aA. RNAB. RibonucleoproteinC. Repetitive DNAD. Simple protein

Telomerase is an enzyme which is aA. Simple proteinB. RNAC. FibonucleoprotemD. Repetitive DNA

In a cell membrane, integral proteins areA. partially or totally buried in the membraneB. partially attached to the surfaec of the membraneC. permanently attached to the outer surface of the membraneD. temporarily attached to the surface of the membrane

Membrane-bound ribosomes are involved in the synthesis ofA. secretory proteinsB. peroxisomal proteinsC. nuclear proteinsD. mitochondrial proteins

Which of the following are not membrane bound ?A. MesosomeB. VacuolesC. RibosomesD. Lysosomes

Define Isotonic Solution.

What happens if plasma membrane ruptures or breaks?

What is the difference between diffusion and osmosis ?

State any two function of Plasma Membrane ?

Define Cell size.

Define Cell organelles.

Define Cell Membrane.

Golgi apparatus/apparato reticulare is specialized for all exceptA. Glycosidation and glycosylation oflipids and proteinsB. Recycling of the plasma membrane pinched off by pi- nocytosis and phagocytosisC. SecretionD. Intracellular digestion