Home
Current Affairs January 2024

What is the correct answer?

4

Which one of the following pairs is not correctly matched?

A. Cristae The tubular structure formed by the folding of the inner membrane of the mitochondrion.

B. Plasmodesmata The membrane surrounding the vacuole in plants.

C. Grana Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.

D. Middle lamella Layer between adjacent cells walls in plants derived from cell plate.

Correct Answer :

B. Plasmodesmata The membrane surrounding the vacuole in plants.


Plasmodesmata are cytoplasmic bridges between two adjacent cells which connect the neighbouring cells.

Related Questions

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

Function of RER is

A. autolysis

B. protein synthesis

C. lipid synthesis

D. carbohydrate synthesis

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

Most of water, in mature plant cells occurs in

A. nucleus

B. cell wall

C. vacuoles

D. cytoplasm

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 of the following is not the function of cell wall?
  1. Provides shape to the cell.
  2. Protects the cell from mechanical damage and infection.
  3. Helps in cell to cell interaction.
  4. Provides barrier to undesirable macromolecules.

A. Only (i)

B. Only (iv)

C. Only (ii), (iii) and (iv)

D. None of the above

What is the correct answer?

4

Which of the following statements is/are correct ?
  1. The shape of the cells may vary with the function they perform.
  2. Human RBC is about 7.0 ??m in diameter.
  3. Cytoplasm is the main area of cellular activities.
  4. Various chemical reactions occur in cytoplasm to keep the cell in the living state.

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

B. Only (i) and (ii)

C. Only (iv)

D. None of the above

What is the correct answer?

4

Centrifugation of a cell results in the rupture of the cell membrane and the contents compacting into a pellets in the bottom of the centrifuge tube. Bathing this pellet with a glucose solution yields metabolic activity including the production of ATP. One of the contents of this pellet is most likely which of the following?

A. Cytosol

B. Mitochondria

C. Lysosomes

D. Golgi bodies

What is the correct answer?

4

Which one of the following organelle given below is correctly matched with its function ?

A. Golgi apparatus Protein synthesis

B. Golgi apparatus Formation of glycolipids

C. Rough endoplasmic reticulum Protein synthesis

D. Rough endoplasmic reticulum Formation of glycoproteins

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

Statement 1: Centrosomes and centrioles are related to each other.
Statement 2: Centrosome usually contains two cylindrical structures called centrioles.

A. Both statements -1 and statement - 2 are true and statement - 2 is the correct explanation of statement - 1.

B. Both statements -1 and statement - 2 are true but statement - 2 is not the correct explanation of statement - 1.

C. Statement -1 is true and statement - 2 is false.

D. Statement -1 is false and statement - 2 is true.

What is the correct answer?

4

Active transport across biomembrane involves

A. production of ATP

B. requirement of energy

C. production of toxin

D. release of energy

What is the correct answer?

4

The lipid component of the membrane mainly consists of __________.

A. polysaccharides

B. phosphoglyceride

C. monosaccharaides

D. both (a) and (c)

What is the correct answer?

4

Which of the following statements is/are correct ?
  1. The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles.
  2. ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen.
  3. Ribosomes are involved in protein synthesis.
  4. Mitochondria help in oxidative phosphorylation and generation of ATP.

A. (ii), (iii) & (iv)

B. (i) only

C. (ii) only

D. (iii) only

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

Membranous extensions in blue green algae are known as

A. phytochrome

B. chromatophore

C. mesosome

D. pneumatophore

What is the correct answer?

4

Which of the following pair are correctly matched ?
(I) Amyloplasts Store proteins
(II) Mitochondrion Power house of the cell
(III) Stroma Chlorophyll pigment
(IV) Axoneme 9 + 2 array

A. (I) and (III) only

B. (II), (III) and (IV) only

C. (III) and (IV) only

D. (II) and (IV) only

What is the correct answer?

4

The main organelle involved in modification and routing of newly synthesized proteins to their destinations is

A. chloroplast

B. mitochondria

C. lysosome

D. endoplasmic reticulum

What is the correct answer?

4

Chromosomes having equal or almost equal arms are called

A. metacentric

B. acrocentric

C. polycentric

D. acentric.

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

Plastids storing fat are called

A. Elaioplasts

B. Sphaerosomes

C. Aleuroplasts

D. Pyrenoids

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

Select the correct match of the types of neuron present in column I with its location given in column II.
Column IColumn II
A. Centrioles(i) Non-membrane bound organelle which helps in cell division
B. Fimbriae(ii) Special structure of bacteria which help them to attach with rocks in stream and also to host tissue
C. Endomembrane(iii) Includes those organelles system whose functions are coordinated
D. Mitochondria(iv) Divide by fission and site of aerobic respiration

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

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

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

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

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

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

Which of the following option correctly match A, B, C, and D indicated in the given sectional view of chloroplasts.

A. A - Thylakoid, B-Stromal lamella, C - Stroma, D - Granum

B. A - Granum, B - Thylakoid, C - Stromal lamella, D - Stroma

C. A - Thylakoid, B - Granum, C - Stromal lamella, D - Stroma

D. A - Granum, B - Thylakoid, C - Stroma, D - Stromal lamella

What is the correct answer?

4

Choose the incorrect match.

A. Nucleus RNA

B. Lysosome Protein synthesis

C. Mitochondria Respiration

D. Cytoskeleton Microtubules

What is the correct answer?

4

Read the folowing statements and identify the correct option.
  1. Contractile vacuole takes part in osmoregulation and excretion.
  2. Food vacuole is formed by engulfing the food particles.
  3. The vacuole is bound by a double membrane called tonoplast.
  4. Vacuole can occupy upto 90 percent of the volume of the cell.

A. (i) and (ii)

B. (ii) and (iv)

C. (i), (ii) and (iv)

D. None of the above

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


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

A. W

B. X

C. Y

D. Z