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 statements is false?

  1. Chloroplast can arise from leucoplast.

  2. Chromoplast can develop from leucoplast.

  3. All plastids possess naked DNA.

  4. Leucoplasts are formed from proplastids.

  5. Leucoplast can arise from golgi bodies.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

False statement. Leucoplast cannot arise from golgi bodies. It can arise from proplastids and leucoplast. So, this option is right.

Multiple choice

Amyloplasts are specialised into

  1. synthesis of fat

  2. storage of fat

  3. storage of protein

  4. synthesis of protein

  5. storage of starch
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Amyloplasts are specialised into the storage of starch. So, this option is right.

Multiple choice

Endosymbiosis is useful for

  1. only host

  2. only endosymbiont

  3. both host and endosymbiont

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Symbiosis is useful for both host and endosymbiont. 

Multiple choice

Phytoplasma antigenic protein interacts with which of the following?

  1. Endoplasmic reticulum

  2. Spindle fibers

  3. Microfilament complex

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

Phytoplasma antigenic protein has been shown to interact with insect microfilament complexes. It is believed to be the determining factor in insect-phytoplasma interaction.

Multiple choice

Which of the following terms refers to PCD?

  1. Apoptosis
  2. Necrosis
  3. Entosis
  4. Anoikis

  1. 1 and 2

  2. 1 and 4

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Apoptosis is the process of programmed cell death that may occur in multicellular organisms where biochemical events lead to characteristic changes in morphology of cell and death. These changes include blebbing, cell shrinkage, nuclear fragmentation, chromatin condensation and chromosomal DNA fragmentation. Anoikis is a form of programmed cell death which is induced by anchorage-dependent cells detaching from the surrounding extracellular matrix.