Tag: biology

Questions Related to biology

Thylakoids are found in 

biology photosynthesis site of photosynthesis chloroplast and pigments of photosynthesis pigments action spectrum and absorption spectrum spectrum of electromagnetic radiation

  1. bacteria

  2. blue green algae

  3. higher plants

  4. all of these

Show answer
Correct Option: A

Read the different combinations of terms given below. The correct combination of terms with reference to an animal cell is : 

biology cell structure and micro-organisms animal cell plant and animal cell cell structure

  1. Cell wall, Cell membrane, Nucleus, Plastid

  2. Cell wall, Nucleus, Ribosome, Chromosome

  3. Cell membrane, Ribosome, Mitochondria, Chromosome

  4. Cell membrane, Ribosome, Mitochondria, Chloroplast

Show answer
Correct Option: C
Explanation:
  • Animal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles like ribosomes, mitochondria etc. 
  • Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall. 
  • Hence, The correct combination of terms with reference to an animal cell is cell membrane, ribosome, mitochondria, chromosome.
  • So, the correct answer is 'cell membrane, ribosome, mitochondria, chromosome'.

When waters enters the cell, one of the pressure is exerted on the cell wall  

biology cell structure animal cell plant and animal cell cell structure and micro-organisms

  1. Osmotic pressure

  2. Suction pressure

  3. Turgor pressure

  4. Root pressure

Show answer
Correct Option: C
Explanation:

When water enters the cell of a plant cytoplasm and exerts an outward pressure and that pressure is called turgor pressure. A cell wall is rigid and flexible therefore exerts an equal and opposite wall pressure against the expanding protoplasm. Thus, turgor pressure becomes equal to the wall pressure when no exchange of water takes place and equilibrium are established.

One of the following is a largest cell.

biology cell structure and micro-organisms animal cell plant and animal cell cell structure

  1. Human egg

  2. Frog egg

  3. Emu egg

  4. Ostrich egg

Show answer
Correct Option: D
Explanation:

Multicellular eukaryotes have a cell size in the range of 5 to 100$\mu$m. Largest cells are animal eggs. Largest egg of a land animal is that of ostrich (17 cm x 15 cm), while for an aquatic animal, it is that of whale shark (30 cm in diameter).

Thus, the correct answer is option D.

Animal cells have larger vacuoles as compared to plants.

biology cell structure and micro-organisms animal cell plant and animal cell cell structure

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: B
Explanation:

Plants don't have excretory system, thus possess larger vacuole to store their waste metabolites. Whereas animals have comparatively smaller vacuoles used for storage's of food materials.

Layer of actively dividing cells in skin of frog is termed as stratum




biology cell structure animal cell plant and animal cell cell structure and micro-organisms

  1. Malpighi

  2. Corneum

  3. Compactum

  4. Spongiosum

Show answer
Correct Option: A
Explanation:

The cells of stratum malpighi of frog are continue growing and divide mitotically throughout life to form new layer being pushed towards the surface successively.

How many types of cells in human body are known, based on the tissues they form?

biology cell structure and micro-organisms animal cell plant and animal cell cell structure

  1. Six

  2. Seven

  3. Eight

  4. Four

Show answer
Correct Option: C
Explanation:

Human body has eight type of cells based on the tissues formed by them. They are as followed:

1) Bone cells known as osteocytes helps in the formation of bone which is a connective tissue.
2)  Cartilage cells helps in the formation of flexible cartilage and provides flexibility to parts like auricle.
3)  Nerve cells forms the nervous system and helps in transmission of nerve signal.
4) Epithelial cell forms the covering of other cells. It also helps in wear and tear mechanism.
5)  Muscle cells are present in the muscle tissue. It is rich in actin and myosin and help in muscle contraction.
6) Secretory cell form glands and secrete hormones, oil and enzymes. For example, pancreatic cells which secrete insulin, glucagon, salivary gland secrete salivary amylase, sebaceous gland secrete oil on the skin etc.They are found in all secretory organs.
7)  Adipose cells forms adipose tissue and helps in storage of fat.
8) Blood cells include RBC’s, WBC, Thormbocytes etc. RBC carry haemoglobin and helps in respiration. WBC plays active role in defensive mechanism and thromocytes helps in blood clotting with the help of thromboplastin.
So, the correct answer is option C.

The finger-like projections which increase the surface area in the small intestine are called ..........

biology cell structure animal cell plant and animal cell cell structure and micro-organisms

  1. Pseudopodia

  2. Villi

  3. Lumen

  4. None of the above

Show answer
Correct Option: B
Explanation:

  • Pseudopodia are temporary protrusions that are filled with cytoplasm within the eukaryotic amoeboid cells and unicellular protists. Pseudopodia, also called as "false foot" are majorly used for movement and ingestion of food, nutrients and other particulate matter.
  • Villi are the finger-like projections within the small intestine that help in the absorption of nutrients from the digested food by increasing the surface are of intestine walls.
  • Lumen is the inside space of the gastrointestinal tract, through which the food is transported while digesting from mouth to anus.
Thus the correct answer is 'Villi'.

Which of the following structures helps you to determine that it is not an animal cell?

biology cell structure and micro-organisms animal cell plant and animal cell cell structure

  1. Cell wall and Vacuole

  2. Mitochondria and Ribosome

  3. Ribosomes and Lysosomes

  4. Plasma membrane

Show answer
Correct Option: A
Explanation:

Plant cell is surrounded by cell wal while the animal cell is starts with plasma membrane. The vacuoles are dispersed in animal cell while the plant cell has a large central vacuole.

So, the correct answer is option A.

An animal cell placed in pure water will

biology cell structure and micro-organisms animal cell plant and animal cell cell structure

  1. Swell up and burst

  2. Shrink and die

  3. Shrink and undergo plasmolysis

  4. Swell up and develop turgidity

Show answer
Correct Option: A
Explanation:

When animal cells are placed in pure water (Which is as good as a hypotonic solution) they will take in water due to osmosis. The intake of water will make the cells swell up and eventually burst as the cell membrane is weak and it is unable to take the pressure.
Thus, the correct answer is option A.