Tag: enzymes and hormones

Questions Related to enzymes and hormones

Increased blood pressure may be caused by the excess secretion of:

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Thyroxin.

  2. Testosterone.

  3. Estradiol.

  4. Adrenaline.

Show answer
Correct Option: D
Explanation:

Increased blood pressure may be caused by the excess secretion of adrenaline. This powerful hormone is a part of the human body's acute stress response system.


 It work by stimulating the heart rate, contracting blood vessels, and dilating air passages, all of which work to increase blood flow to the muscles and oxygen to the lungs.

Hence,option D is correct.

The total number of amino acids in a molecule of the Hypoglycemic hormone is:

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. 30

  2. 21

  3. 51

  4. 27

Show answer
Correct Option: C
Explanation:

The total number of amino acids in a molecule of the Hypoglycemic hormone is 51. The human hormone insulin is composed of 51 amino acids. It is a dimer of an A-chain consisting of 21 amino acids, and a B-chain consisting of 30 amino acids, which are linked together by disulphide bonds.

The hormones that have 'anti inflammatory' effect are the:

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Thyroxin

  2. Insulin

  3. Glucocorticoids

  4. Auxins

Show answer
Correct Option: C
Explanation:

Thyroxin is secreted from thyroid gland. It regulates general growth and development and controls carbohydrate, lipid and protein metabolism.
Insulin is secreted in pancreatic islets. It controls carbohydrate metabolism and maintains glucose level in the blood.
Glucocorticoids have antiinflammatory effect. They are part of the feedback mechanism in the immune system that turns immune activity (inflammation) down.
Auxins play vital role in several growth and behavioral processes in the plant's life cycle and are essential for plant body development.

The hormone which controls the contraction of uterus after child birth and also produces lactation in the mammary glands is:

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Insulin

  2. Oxytocin

  3. Estrone

  4. Estradiol

Show answer
Correct Option: B
Explanation:

The hormone which controls the contraction of uterus after child birth and also produces lactation in the mammary glands is oxytocin. Oxytocin is released from the posterior lobe of the pituitary gland. The release of oxytocin include childbirth, suckling and coitus, the uterine contractions that result may facilitate either childbirth or the ascent of spermatozoa through the fallopiantubes. Oxytocin may also play a role in the initiation of labor. The milk ejection response occurs only in females immediately after childbirth.

Match the following.
        SET-A                                 SET-B
Type of hormone               Name of hormone
1) Steroid hormone            a) Cytokinins
2) Non Steroid                   b) Estrogens
3) Plant hormone               c) Auxins
4) Peptide hormone           d) Insulin

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. 1-b, 2-b, 3-c, 4-d

  2. 1-b, 2-a, 3-d, 4-c

  3. 1-b, 2-a,d 3-a,c, 4-d

  4. 1-c, 2-a, 3-d, 4-b

Show answer
Correct Option: C
Explanation:
Estrogens are steroidal hormones. They contain steroid (cholesterol) nucleus in their structure.

Cytokinins and Insulin are non steroidal hormones. They do not contain steroid (cholesterol) nucleus in their structure.

Cytokinins and Auxins are plant hormones. Auxins play vital role in several growth and behavioral processes in the plant's life cycle and are essential for plant body development.

Insulin is a peptide hormone. It affect the properties of plasma membrane. It is secreted in pancreatic islets. It controls carbohydrate metabolism and maintains glucose level in the blood.

1-b 
2-a,d
3-a,c 
4-d

Which of the following contain disulphide linkages?

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Oxytocin

  2. Vasopressin

  3. Insulin

  4. Haemoglobin

Show answer
Correct Option: A,B,C
Explanation:

Oxytocin, Vasopressin and Insulin contains disulphide bonds due to presence of cystine residues.
Disulphide bonds are absent in Haemoglobin.

The hormone which controls the processes of burning of fats, proteins and carbohydrates and liberates energy in the body is:

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Thyroxine

  2. Adrenaline

  3. Insulin

  4. Cortisone

Show answer
Correct Option: C
Explanation:

Insulin is a peptide hormone produced by beta cells in the pancreas. It regulates the metabolism of carbohydrates and fats by promoting the absorption of glucose from the blood to skeletal muscles and fat tissue and by causing fat to be stored rather than used for energy.

Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories :

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. A coezyme

  2. A hormone

  3. An enzyme

  4. An antibiotic

Show answer
Correct Option: B
Explanation:

A hormone is a class of signaling molecules produced by glands inmulticellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour. Insulin is a hormone which are responsible for the level of sugar in blood and hence maintaining the level of diabetes.

Which of the following is a female sex hormone?

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Adrenaline

  2. Estrone

  3. Cortisone

  4. Testosterone

Show answer
Correct Option: B
Explanation:

Estrone is an estrogenic hormone secreted by the ovary.Responsible for female sex development.

The first sex attractant pheromone identified was that of

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Cat

  2. Dog

  3. Gypsy moth

  4. Human

Show answer
Correct Option: C
Explanation:

A pheromone is a secreted or excreted chemical factor that triggers a social response in members of the same species. The first sex attractant pheromone identified was that of Gypsy moth.