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 correct?

  1. A hen's egg is a cell, which can be seen with a naked eye.

  2. Plastids are only green in colour.

  3. Ribosomes are the smallest cell organelles without proteins.

  4. Nucleus is called the kitchen of the cells.

  5. The size of the cell depends upon the size of the organism.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct statement. A hen's egg is a cell,  which can be seen with a naked eye.

Multiple choice

The plant cell wall _______________.

  1. is the power house of the cell.

  2. is round shaped

  3. is made of cellulose.

  4. can change its shape

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

The plant cell wall is made of cellulose.

Multiple choice

Which of the following is pseudopedia?

  1. The movement of substances or materials.

  2. The protruding projection, which helps in movement and feeding.

  3. The coloured bodies in the cytoplasm of the cells.

  4. The function of cellular respiration.

  5. The transfer of hereditary characteristics.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The protruding projection,  which helps in movement and feeding of ameoba is called pseudopedia.

Multiple choice

Which among the following is not a function of cytoplasm?

  1. It helps in the movement of the internal organelles.

  2. The enzymes in the cytosol break down large molecules, thereby helping the organelles to use them.

  3. Anaerobic glycolysis and protein synthesis takes place in the cytoplasm.

  4. Acts as a site for transcription.

  5. Cytoplasm provides support to the internal structures of the cell.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nucleus is a site for transcription in which messenger RNA (mRNA) are produced for protein synthesis.

Multiple choice

The cell organelle regarded as the post office of a cell is ______________.

  1. ribosome

  2. golgi bodies

  3. chromosomes

  4. cytoplasm

  5. lysosomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the flattened membrane, which is mainly used to store the substances made by the cell. This membrane also helps in preserving and transporting materials within the cell. Hence, it is also called as the post office of a cell.

Multiple choice

What is the name of the membrane that surrounds all the organelles?

  1. Nuclear membrane

  2. Cell membrane

  3. Tonoplast

  4. Cell wall
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The cell membrane (also called plasma membrane) surrounds all organelles as well as the entire cell. It is selectively permeable and regulates the movement of substances in and out. The nuclear membrane specifically surrounds only the nucleus.

Multiple choice

Which of the following statements is true for both, bacilli and honey bee?

  1. Both have RNA as their genetic material.

  2. Both have lysosome.

  3. Both have ribosome and genetic information inherited by DNA.

  4. Both have defined nuclear membrane.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both bacteria (bacilli) and honey bees (as eukaryotes) have ribosomes for protein synthesis and DNA as their genetic material. Option A is wrong because bacteria have DNA not RNA as genetic material. Option B is wrong because only eukaryotes have lysosomes. Option D is wrong because bacteria lack a defined nucleus.

Multiple choice

Which of the following types of cell can be seen with the naked eye?

  1. Egg cell of a hen.

  2. Cells of an elephant's brain.

  3. Neurons of a giant squid.

  4. No single cell can be seen with a naked eye.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A hen's egg is a single cell (the yolk is the actual cell) large enough to be visible to the naked eye. Most neurons are microscopic, and while giant squid neurons are exceptionally long, they are still too thin to be clearly visible without magnification.

Multiple choice

Which of the following cellular structures can be found in human egg cell?

  1. Cell wall

  2. Centriole

  3. Tonoplast

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

Human egg cells (oocytes) contain centrioles which help organize the spindle apparatus during cell division. Option A is wrong because animal cells lack cell walls. Option C is wrong because tonoplast is found in plant cells. Option D is wrong because mature human eggs have minimal vacuoles.

Multiple choice

According to the cell theory which of the following statements is correct?

  1. All cells have cell walls.

  2. Cells can arise spontaneously.

  3. Cell is the basic structural unit in living organisms.

  4. All cells have a nucleus.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cell theory states that the cell is the basic structural and functional unit of all living organisms. Option A is wrong because many cells (like animal cells) lack cell walls. Option B is wrong because cells arise only from pre-existing cells (omnis cellula e cellula). Option D is wrong because red blood cells lack nuclei.