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

The chief role of nucleolus in a nucleus is

  1. organisation of chromosomes

  2. replication of DNA

  3. synthesis of ribosomes

  4. chromatid separation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The chief role of nucleolus in a nucleus is synthesis of ribosomes.

Multiple choice

Double membrane is absent in

  1. nucleus

  2. mitochondria

  3. lysosome

  4. chloroplast
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lysosomes are membrane-bound sacs filled with digestive enzymes.

Multiple choice

Cell wall is absent in

  1. plant cell

  2. animal cell

  3. Both 1 and 2

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cell wall is present only in plant cell.

Multiple choice

The powerhouse of the cell is

  1. mitochondria

  2. golgi body

  3. chloroplast

  4. nucleus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitochondria releases energy in the form of ATP for various activities of the cell.

Multiple choice

Centrosome is found in

  1. nucleolus

  2. nucleus

  3. ribosome

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

Centrosomes are the small region of cytoplasm adjacent to the nucleus.

Multiple choice

Robert Hooke observed the cell through

  1. primitive microscope

  2. compound microscope

  3. electron microscope

  4. improved microscope
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In 1665, primitive microscopes were available only to Robert Hooke.