Tag: division for growth and reproduction

Questions Related to division for growth and reproduction

Generally, decline in hearing power begins after the age of 

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. 50 years

  2. 30 years

  3. 40 years

  4. 10 years

Show answer
Correct Option: C
Explanation:

Ageing is the process where there is a continuous decline in the metabolism of the body. The hearing power also declines after the age of 40 years. Presbycusis is the term which is generally used for hearing impairment due to old age. It is mainly caused due to degeneration of the cochlea or associated structures of the inner ear or auditory nerves.

So, the correct answer is option C.

Cell which keeps changing it's shape is called

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Spirilla

  2. Pleomorphic

  3. Symbiont

  4. Gram negative

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Correct Option: A

Power is regeneration is poor in.

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Brain cell

  2. Bone cell

  3. Chondroblasts

  4. Striated muscles

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Correct Option: A

Storage sprouting of potato can be prevented by 

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. IAA

  2. Maleic hydrazide

  3. Cytokinins

  4. Gibberellins

Show answer
Correct Option: B
Explanation:

Maleic hydrazide : It is a growth retardant which checks cell division. So during seed storage this is applied for checking sprouting of potato tubers so that the importance of potato may not be lowered down.

The process of cell death involving DNA cleavage in cells is known as

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Necrosis

  2. Apoptosis

  3. Cytokinesis

  4. Endocytosis

Show answer
Correct Option: B
Explanation:
Apoptosis is the process in living cells which results in the death of cells that are damaged, attacked by pathogens, cancerous cell, abnormal cell, etc. Such cells are identified by the cells of the immune system followed by the production of proteins that kills the cell by DNA cleavage. It is also called programmed cell death. Thus the correct answer is option A. 

Glucose and amino acids are absorbed through the following part of villus.

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Epithelial cells

  2. Blood capillary

  3. Lymphatic vessel

  4. All

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Correct Option: A

Number of cells daily replaced in human body is

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. $1 \times 10^9$

  2. $5 \times 10^9$

  3. $1 \times 10^{10}$

  4. $5 \times 10^{10}$

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Correct Option: A

Heparin is formed by.

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Liver cells

  2. Plasma cells

  3. Blood cells

  4. Spleen cells

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Correct Option: A
Explanation:
Heparin is a naturally occuring anticoagulant which is synthesised in Liver as well as blood cells such as basophils and mast cells. Heparin prevents the formation of blood clots and extension of existing blood clots within the blood.
So, the correct answer is 'Both A and C'.

Fat absorbed from gut is transported in blood as

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Micelles

  2. Liposomes

  3. Chemomicrons

  4. Chylomicrons

  5. Phagocytes

Show answer
Correct Option: D
Explanation:
The products of lipid digestion enter the body by a different process and a different route. These products namely, long chain fatty acids, monoglycerides and diglycerides are insoluble in water and cannot be directly absorbed from intestinal contents. They combine with the bile salts and phospholipids to form small spherical water-soluble molecular aggregates called micelles. From the micelles, fatty acids, glycerides and fat-soluble vitamins are actively absorbed into the intestinal cells. In these cells, the bile salts are freed and fatty acids, glycerol, monoglycerides and diglycerides are resynthesized into fats. The fats are then mixed with cholesterol and coated with special proteins forming small globules called chylomicrons The latter are transported by exocytosis out of the epithelial cells into a lacteal.
Thus, the correct answer is option D. 

Basement membrane is formed of.

mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

  1. Epidermal cells

  2. Endodermal cells

  3. Both A and B

  4. None of the above but present below epithelial cells

Show answer
Correct Option: D
Explanation:

All epithelia are separated from their underlying tissues by an extracellular basement membrane which is fibrous in nature. The basement membrane is the fusion of two lamina namely, the basal lamina and the reticular lamina. The lamina reticularis is attached to the basal lamina with collagen anchoring fibrils and fibrillin microfibrils. The two layers together are collectively referred to as the basement membrane.

So D is the correct option.