Biology · Science General

Cell Biology and Structure

3,221 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 pairs is correctly matched?

  1. Mitochondria – Production of ATP

  2. Golgi body – Synthesis of protein

  3. Lysosome – Synthesis of fats and lipids

  4. Ribosomes – Destruction of foreign substances
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitochondria – Production of ATP Mitochondria are the energy factories of the cells. The energy currency for the work that animals must do is the energy-rich molecule adenosine triphosphate (ATP). ATP is produced in the mitochondria using energy stored in food.

Multiple choice

Which of the following statements is/are false?

a. Chloroplasts are not found in the root cells of a plant. b. The organelles containing pigments present in the cytoplasm of plant cells are called vacuoles. c. The red colour of tomatoes is due to the presence of red-coloured plastids in their cells.

  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
C Correct answer
Explanation

This is the correct option as this statement is false. The organelles containing pigments present in the cytoplasm of plant cells are called plastids.

Multiple choice

Which of following pairs of ‘cell organelle - corresponding function’ is/are incorrectly matched?

  1. Rough endoplasmic reticulum - Protein synthesis
  2. Mitochondria - Lecithin synthesis
  3. Chloroplast - Digestion of food particles

  1. Only 1

  2. Only 2

  3. Only 3

  4. Both 1 and 2

  5. Both 2 and 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  1. Rough endoplasmic reticulum is specialised in synthesising proteins.
    1. Some of the enzymes have been located in mitochondria which help in the synthesis of lipids like lecithin from fatty acids and glycerol.
    2. Chloroplast stroma contains enzymes for conversion of carbon dioxide into carbohydrates. Lysosomes help in intracellular digestion of food particles.
Multiple choice

Which of the following cells are bean-shaped?

  1. Muscle cells

  2. Guard cells of stomatal pores

  3. Nerve cells

  4. White blood cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Guard cells of stomatal pores are bean-shaped. The guard cells contain chloroplasts, so they can manufacture food by photosynthesis.

Multiple choice

Which of the following statements are correct about cell wall? a. It is made of a complex carbohydrate called cellulose. b. It is found in both plant and animal cells. c. It is semi-permeable. d. It is hard and rigid.

  1. Only a and b

  2. Only a and c

  3. Only a and d

  4. All a, b, c and d

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both the statements are correct about cell wall. Cell wall is made of a complex carbohydrate called cellulose. It is hard and rigid.

Multiple choice

Grana are a part of

  1. mitochondria

  2. chloroplasts

  3. aleurone grains

  4. starch grains
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chloroplasts contain grana, which are minute particles consisting of a pile of thin double platelets, containing chlorophylls and carotenoids associated with photosynthesis.

Multiple choice

What is the position of genes in a cell?

  1. In cytoplasm

  2. On plasma membrane

  3. In plastids

  4. Along the chromosomes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genes are arranged in single linear order along the chromosomes in nucleus.

Multiple choice

A nucleolus mainly contains

  1. granular dense fluid

  2. pigments

  3. cellulose

  4. ribonucleic acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A nucleolus found in nucleus mainly contains ribonucleic acid.