Home
Current Affairs January 2024

What is the correct answer?

4


Which cellular structure helps in transferring genetic information from one generation to another?

A. W

B. X

C. Y

D. Z

Correct Answer :

C. Y


The cellular structure Y (nucleus) helps in transfer of genetic material from one generation to another. Nucleus is a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material.

Related Questions

What is the correct answer?

4

In the given figure of animal cell, one orginelle is marked as A. Select the correct identification and function of the organelle A from the given option.

A. Endoplasmic reticulum Synthesis of lipids.

B. Mitochondria Produce cellular energy in the form of ATP.

C. Golgi body Provides packaging material.

D. Lysosomes Secrete hydrolytic enzymes.

What is the correct answer?

4

Match column I (cell type) with column II (size) and choose the correct option.
Column-IColumn-II
(Cell type)(Size)
A. VirusesI. 1-2 ??m
B. PPLOII. 10-20 ??m
C. Eukaryotic cellIII. About 0.1 ??m
D. BacteriumIV. 0.02 - 0.2 ??m

A. A I, B II, C III, D IV

B. A IV, B III, C II, D I

C. A I, B III, C II, D IV

D. A IV, B II, C III, D I

What is the correct answer?

4

Which of the following terms is not correctly matched with its feature?

A. Osmosis Movement of water by diffusion.

B. Nucleoplasm Site of active synthesis of ribosomal RNA.

C. Mesosome Infolding of cell membrane and characteristics of eukaryotes.

D. Pili Elongated tubular surface structures (made of special protein) of bacteria.

What is the correct answer?

4

Which one of the following combination is mismatched?

A. Glycocalyx May be capsule or slime layer

B. Pili Reproduction

C. Cell wall Protective, determines shape, prevents from bursting

D. Flagella, pili and fimbriae Surface structures of bacterial cell

What is the correct answer?

4

Centrioles and centrosomes occur in the cells of

A. green plants

B. animals

C. bacteria and cyanobacteria

D. both (b) and (c)

What is the correct answer?

4

Which of the following is incorrect ?

A. Mycoplasma is the smallest cell (0.3 �).

B. Bacteria are 3 to 5 �m in size.

C. The largest cell is the egg of an ostrich.

D. Nerve cells are some of the smallest cells.

What is the correct answer?

4

Which of the following will determines the shape of the cells and provides a strong structural support to prevent the bacterium from bursting or collapsing?

A. Plasmids

B. Cell wall

C. Mesosome

D. Cell membrane

What is the correct answer?

4

Which one of the following structures between two adjacent cells is an effective transport pathway?

A. Plasmodesmata

B. Plastoquinones

C. Endoplasmic reticulum

D. Plasmalemma

What is the correct answer?

4

What would happen if lysosomes get ruptured in a cell?

A. Cell dies

B. Cell shrinks

C. Cell swell up

D. Nothing would happen

What is the correct answer?

4

Cell sap is a

A. living content of cytoplasm.

B. nonliving content of cytoplasm.

C. nonliving content of vacuole.

D. living content of vacuole.

What is the correct answer?

4

Which of the following lacks cell wall?

A. Gametes

B. Amoeba

C. Mycoplasma

D. All of these

What is the correct answer?

4

Select the incorrect statement about prokaryotic ribosomes.

A. 50S and 30S subunits unite to form 70S ribosomes.

B. Polysome/polyribosome consists of many ribosomes only.

C. Ribosome is the site of protein synthesis.

D. Polysome indicate the synthesis of identical poolypeptide in multiple copies.

What is the correct answer?

4

Which of the following statement of a bacterial cell is/are correct?
  1. Mesosome is formed by the extensions of plasma membrane into the cell.
  2. The pili are elongated tubular structures made up of a protein.
  3. Flagellum is composed of filament, hook and basal body.
  4. Ribosomes are about 30 nm by 50 nm in size.

A. (i), (ii), (iii)

B. All of the above

C. (ii) & (iv)

D. None of the above

What is the correct answer?

4

Given below are some characters of a cell organelle identify the correct organelle which shows all the characters described above.
  1. It is a membrane bound space found in the cytoplasm.
  2. It is bound by a single membrane called tonoplast.
  3. It contains water, sap, excretory products and other materials not useful to the cell.
  4. It has higher concentration of sap than the cytoplasm.

A. Golgi apparatus

B. Lysosomes

C. Endoplasmic reticulum

D. Vacuoles

What is the correct answer?

4

The fluidity of membranes in a plant in cold weather may be maintained by

A. increasing the number of phospholipids with unsaturated hydrocarbon tails.

B. increasing the proportion of integral proteins.

C. increasing concentration of cholesterol in membrane.

D. increasing the number of phospholipids with saturated hydrocarbon tail.

What is the correct answer?

4

Match column-I (scientists) with column-II (discovery) and select the correct option.
Column-IColumn-II
A. LeeuwenhoekI. First saw and described a living cell
B. Robert BrownII. Presence of cell wall is unique to plant cells
C. SchleidenIII. Discovered the nucleus
D. SchwannIV. All plants are composed of different kind of cells

A. A I, B III, C IV, D II

B. A I, B III, C II, D IV

C. A III, B I, C IV, D II

D. A I, B IV, C II, D III

What is the correct answer?

4

Which of the following statements are incorrect ?
  1. Plant cells have centrioles which are absent in almost all animal cells.
  2. Ribosomes are the site of protein synthesis.
  3. The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
  4. In animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum. Of the above statements

A. (i) and (iii)

B. (iii) and (iv)

C. (ii) and (iv)

D. (i) and (iv)

What is the correct answer?

4

The given figures show two types of cell. Which structures are common to both the cells?

A. Nucleus and cell wall

B. Nucleus and cytoplasm

C. Ribosomes and flagella

D. Ribosomes and cell wall

What is the correct answer?

4

Match column-I with column-II and select the correct option.
Column - IColumn - II
A. RERI. Intracellular and extracellular digestion
B. Cell wallII. Provide structural support to the cell
C. FlagellaIII. Protein synthesis and secretion
D. LysosomesIV Responsible for cell movement

A. A III, B II, C IV, D I

B. A II, B III, C IV, D I

C. A I, B III, C II, D IV

D. A IV, B II, C III, D I

What is the correct answer?

4

Which one of the following is not considered as part of the endomembrane system?

A. Golgi complex

B. Peroxisome

C. Vacuole

D. Lysosome

What is the correct answer?

4

Microtubules are absent in

A. mitochondria

B. centriole

C. flagella

D. spindle fibres

What is the correct answer?

4

A component of cytoskeleton is

A. microtubule

B. bone

C. chitin

D. cartilage.

What is the correct answer?

4

Match the items given in column-I with their role given in column-II and choose the correct option.
Column-IColumn-II
A. SERI. Increase the surface area
B. Golgi apparatusII. Store oils or fats
C. CristaeIII. Excretion
D. PeroxisomeIV. Photorespiration
E. ElaioplastsV. Synthesis of lipid

A. A V; B III; C I; D IV; E II

B. A V; B III: C II; D IV; E I

C. A II; B III; C I; D IV; E V

D. A III; B IV; C I; D V; E II

What is the correct answer?

4

Identify the components labelled as A, B, C, D and E in the diagram given below from the list (i) to (viii).

  1. Cristae of mitochondria
  2. Inner membrane of mitochondria
  3. Cytoplasm
  4. Smooth endoplasmic reticulum
  5. Rough endoplasmic reticulum
  6. Mitochondrial matrix
  7. Ribosome
  8. Nucleus

A. A - (viii), B - (v), C - (vii), D - (iii), E - (iv)

B. A - (i), B - (iv), C - (vii), D - (vi), E - (iii)

C. A - (vi), B - (v), C - (iv), D - (vii), E - (i)

D. A - (v), B - (i), C - (iii), D - (ii), E - (iv)

What is the correct answer?

4

Function of contractile vacuole in Amoeba is

A. excretion and osmoregulation.

B. digestion and respiration.

C. osmoregulation and transportation.

D. none of the above.

What is the correct answer?

4

Select the statements which are related to Schwann.
  1. He reported that cells have a thin outer layer which is today known as plasma membrane
  2. Cell wall is a unique character of the plant cell.
  3. Body of plants and animals are composed of cells and products of cells.

A. Only (i)

B. Only (iii)

C. (i) and (iii)

D. All of these

What is the correct answer?

4

Nucleolus is

A. rounded structure found in cytoplasm near nucleus.

B. rounded structure inside nucleus and having rRNA.

C. rod-shaped structure in cytoplasm near the nucleus.

D. none of the above.

What is the correct answer?

4

Read the statements given below with regard to the functions performed by Golgi apparatus ?
  1. Transport and chemically modify the materials contained within it.
  2. Performs the function of packaging materials.
  3. Important site of formation of glycoproteins and glycolipids.

Which of the following is the correct answer ?

A. (i) is wrong but (ii) and (iii) are correct

B. (ii) is wrong but (i) and (iii) are correct

C. (ii) and (iii) are wrong but (i) is correct

D. All are correct.

What is the correct answer?

4

9.A student was given cell samples (A and B) to identify parts which are highlighted. He observed the samples under the microscope and list down the function of the part of cell sample. The information collected by the student is listed in the table below, on the basis of which the student infers that the samples contain the organelles.
Sample ASample B
Make energy available for cellular metabolismGenerates ATP and synthes izes s ugar
Absent in cell that carry oxygen throughout the bodyPresent in plant cell
Called the energy currency of cellSource o f all the food energy

Explain why the samples were belonged to eukaryotic cell and not prokaryotic cell? Because,

A. eukaryotic cell have membrane bound organelles.

B. eukaryotic cell have non - membrane bound organelles.

C. eukaryotic cell are smaller and multiply more rapidly than prokaryotic cells.

D. eukaryotic cell are larger and multiply more rapidly than prokaryotic cells.

What is the correct answer?

4

The best material for study of structure of cell membrane is

A. RBC of human

B. RBC of frog

C. cheek cell of human

D. liver cell of rat