Tag: biology

Questions Related to biology

Select the set of cell organelles that are the part of endomembrane system:
(i) Endoplasmic reticulum
(ii) Golgi body
(iii) Mitochondria
(iv) Chloroplast
(v) Microbodies
(vi) Lysome
(vii) Vacuole.

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. i, ii, iii, v, vi

  2. i, iv, vi, vii

  3. ii, v, vi, vii

  4. i, ii, vi, vii

Show answer
Correct Option: A

Organelle rich in Manganese is

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. Ribosome

  2. Mitochondrion

  3. Chloroplast

  4. Lysosome

  5. Nucleus.

Show answer
Correct Option: B

Which is wrong

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. Both chloroplast and mitochondrion has an internal compartment or thylakoid space bounded by thylakoid membrane

  2. Both contain DNA

  3. Chloroplast is generally larger

  4. Both are covered by double membrane.

Show answer
Correct Option: A

Number of protofilaments present in a microtubule is

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. 15

  2. 13

  3. 10

  4. 5.

Show answer
Correct Option: B

Which organelle occurs both in plants and animals

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. Cell wall

  2. Mitochondria

  3. Centriole

  4. Chloroplast.

Show answer
Correct Option: B

Beside the nucleus, which of the following cell organelles play an important role in hybrid vigor?
a. Lysosome
b. Mitochondria
c. Endoplasmic reticulum
d. Plastid
Select the correct answer using the codes given.

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. $1$ and $2$

  2. $1$ and $4$

  3. $2$ and $3$

  4. $2$ and $4$

Show answer
Correct Option: A

How does a cell rid itself of defective or malfunctioning organelles?

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. They are engulfed by plastids and stored until export from cell is possible

  2. Defective parts accumulate until the cell itself dies

  3. They are exported by exocytosis

  4. Lysosomes assist in the removal of defective organelles by digesting them

Show answer
Correct Option: D
Explanation:

The lysosomes may be called "suicide bags" of the cell in view of their autolytic role, or "disposal units" of the cell because they digest the incoming food materials and remove the foreign bodies, toxic molecules, and debris; or "recycling centres" as they break down warn out and defective cells and cell organelles to component molecules for building new organelles and cells.

Cell cultures of Lithospermum erythrorhizon are being used commercially for preparing.

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. Berberine

  2. Plamitine

  3. Shikonin

  4. Plumagin

Show answer
Correct Option: A

Rapid and irreversible cell elongation occurs commonly in plants but not in animals. This difference is due to the.

biology organisation of the organism membrane bound organelles cell: size and differentiation microscopy

  1. Presence of chloroplasts and mitochondria

  2. Absence of centrioles and Golgi bodies

  3. Absence of endoplasmic reticulum and presence of large vacuoles

  4. Presence of large vacuoles and cell walls

Show answer
Correct Option: A

Cholesterol is synthesised in

biology digestion and absorption liver functions of the liver secretory organs

  1. Brunners glands

  2. Liver

  3. Spleen

  4. Pancreas

Show answer
Correct Option: B