Biology · Science General

Cell Biology and Structure

3,062 Questions

Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.

Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components

Cell Biology and Structure Questions

Multiple choice

Which of the following statements is/are false?

a. The smooth endoplasmic reticulum helps in the manufacture of lipids, which are important for cell functioning. b. The smooth endoplasmic reticulum plays a crucial role in detoxifying many poisons and drugs. c. Organs are made up of organelles. Organelles comprise of cells and cells are made up of tissues.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option.

Multiple choice

Which of the following is not a function of the endoplasmic reticulum?

  1. It forms supporting skeletal framework of the cell.

  2. Rough ER is concerned with the transport of proteins.

  3. Certain enzymes present in the smooth ER synthesise fats, steroids and cholesterol.

  4. It produces vacuoles which contain cellular secretion.

  5. ER provides a pathway for the distribution of nuclear material from one cell to the other.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. 

Multiple choice

Match the following:

 
a. Plasma membrane 1. are thread-like structures usually present in the nucleus that become visible only during cell division
b. Chromosomes 2. are the dense, spherical and grannular particles which occur freely in the matrix or remain attached to the endoplasmic reticulum
c. Ribosomes 3. is a living, thin, delicate, elastic and selective permeable membrane

  1. a - 3, b - 2, c - 1

  2. a - 1, b - 2, c - 3

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 1, c - 3

  5. a - 3, b - 1, c - 2
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option.

Multiple choice

Match the following:

 
a. Mitochondria 1. consists of a system of membrane-bound vesicles arranged approximately parallel to each other in stacks
b. Lysosomes 2. an organelle in which the biochemical processes of respiration and energy production occur
c. Golgi apparatus 3. are a kind of waste disposal system of the cell that keep the cell clean by digesting any foreign material as well as worn-out cell organelles

  1. a - 2, b - 3, c - 1

  2. a - 2, b - 1, c - 3

  3. a - 1, b - 2, c - 3

  4. a - 3, b - 2, c - 1

  5. a - 1, b - 3, c - 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option.

Multiple choice

Which of the following statements is/are false?

a. In plant cells, a cell wall, composed mainly of cellulose, is located inside the cell membrane. b. Chromoplasts that contain chlorophyll are called chloroplasts and they perform photosynthesis. c. The energy required for various chemical activities needed for life is released by mitochondria in the form of adenosine triphopshate molecules.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. In plant cells, a cell wall, composed mainly of cellulose, is located outside the cell membrane.

Multiple choice

Which of the following statements is true about nissil bodies?

  1. It takes part in DNA replication.

  2. It is made up of rough endoplasmic reticulum (RER).

  3. Nissil bodies are involved in transcription.

  4. Nissil bodies are involved in proof reading while DNA replication.

  5. Nissil bodies are made up of golgi bodies.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nissil bodies are made up of rough endoplasmic reticulum.

Multiple choice

Match List I and List II and select the correct answer using the codes given below the Lists: List I List II (Cell organelle) (Function) (a) Endoplasmic Reticulm 1. Degradation of fatty acids and amino acids (b) Mitochondrion 2. Synthesis of glycoproteins and lipids (c) Peroxisome 3. Degradation of worn-out cell constituents (d) Lysosome 4. Energy metabolism

  1. (a) 1 (b) 4 (c) 3 (d) 2

  2. (a) 2 (b) 4 (c) 1 (d) 3

  3. (a) 4 (b) 2 (c) 1 (d) 4

  4. (a) 2 (b) 1 (c) 4 (d) 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Endoplasmic Reticulum synthesizes glycoproteins and lipids (2), Mitochondrion handles energy metabolism via cellular respiration (4), Peroxisomes break down fatty acids and amino acids (1), and Lysosomes degrade worn-out cell constituents through autophagy (3). The correct sequence is (a) 2, (b) 4, (c) 1, (d) 3.