Chemical Coordination and Integration Test 49

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Chemical Coordination and Integration Test 49

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Weekly Quiz Competition

Question 1
1 / -0

During proliferative phase, mitosis in endometrium is stimulated by ______________.

A
Oestrogen

B
FSH

C
Progesterone

D
LH

Solution

During the proliferative phase, the secretion of estrogen through the growing ovarian follicle is responsible for the proliferation of the endometrium by intensive mitosis in the glandular epithelium and in the stroma.
So, the correct option is 'Estrogen'.
Question 2
1 / -0

The thyroid hormones are strored as

A
Glycoproteins

B
Thyroglobulin

C
T3 and T4

D
Polycyclic hydrocarbons
Solution
- Thyroid hormones are two hormones produced and released by the thyroid gland, namely triiodothyronine ($$T_3$$) and thyroxine ($$T_4$$).
- The thyroid hormones are stored as Thyroglobulin and are released when the thyroglobulin molecule is taken back up into the follicular cells of the thyroid gland.
- Hence the thyroid hormones are stored as Thyroglobulin.
- So, the correct answer is 'Thyroglobulin'.
Question 3
1 / -0

Pancreas is a

A
Holocrine gland

B
Apocrine gland

C
Merocrine gland

D
All of the above
Question 4
1 / -0

Read the following statements carefully to give the correct answer.

A
Protein hormones interact with the intra-cellular receptor.

B
Iodothyronine hormone generates secondary messenger after interaction with the receptor.

C
Hormone is cell specific.

D
Somatostatin hormone is secreted only by hypothalamus.
Question 5
1 / -0

Insulin controls the metabolism of -

A
fats

B
Hormones

C
Carbohydrates

D
Proteins
Solution
Insulin, secreted by the pancreatic beta-cell is a key hormone in the adaptations of metabolic pathways linked to glucose homeostasis.
- It inhibits hepatic glucose production, promotes glucose storage in the liver and glucose uptake and storage in muscles and adipose tissues.
- Hence, Insulin controls the metabolism of Carbohydrates.
- So, the correct answer is 'Carbohydrates'.
Question 6
1 / -0

Which one of the following conditions correctly describes the manner of determining the sex in the given example

A
Homozygous sex chromosomes (xx) produce male in Drosophila

B
Homozygous sex chromosomes (ZZ) determine female sex in birds

C
XO type of sex chromosomes determines female sex in grasshopper

D
XO condition in human as found in turner syndrome, determines females sex
Question 7
1 / -0

Gonadotropin releasing hormone is transferred to anterior pituitary by

A
left coronary artery

B
hypophysial portal artery

C
axons of neurosecretory cells

D
nuclei of hypothalamus

Solution

Gonadotropin-releasing hormone is a hormone responsible for releasing FSH and LH from anterior pituitary gland. It is transferred to the anterior pituitary gland by the hypophysial portal artery.
So, the correct option is 'Hypophysial portal artery'.
Question 8
1 / -0

The mode of action of steroid hormones involves

A
A second messenger

B
Modification of enzyme activity

C
Stimulation of DNA replication

D
Stimulation of mRNA transcription

Solution

A. A second messenger
EXPLANATION: Steroid hormones are derived from cholesterol. This hormone is associated with a G-protein. This G-protein becomes activated when the hormone binds the receptor. Steroid hormone involves a second messenger when it is in the mode of action.
Question 9
1 / -0

The signal transduction of steroid hormone across cell is through?

A
Binding of the hormone to the cytoplasmic receptor and the complex binds to hormone response element on DNA with promoter DNA.

B
Binding of the hormone to the transmembrane receptor initiates the production of the second messenger that activates enzymes which further activates transcription factors.

C
Binding of the hormone to the transmembrane receptor which diffuses inside the cell cytoplasm and then activates the enzyme necessary for the activation of transcription factors.

D
Binding of the hormone to the cytoplasmic receptor initiates the production of the second messenger which activates enzymes that further activates transcription factors.

Solution

Steroid hormones, i.e., androgens, estrogens, glucocorticoids, mineralocorticoids, and progestins, bind with high affinity to their respective steroid hormone receptors (SR).

Steroid hormone receptors are found in the nucleus, cytosol, and also on the plasma membrane of target cells. They are generally intracellular receptors (typically cytoplasmic or nuclear) and initiate signal transduction for steroid hormone which leads to changes in gene expression over a time period of hours to days.

So the correct answer is option C.
Question 10
1 / -0

Intracellular receptors are mostly?

A
Cytoplasmic receptors

B
Membrane receptors

C
Both A and B

D
ER receptors

Solution

Intracellular receptors are protein receptors, which are found on the inside of the cell, especially in the cytoplasm or nucleus. The ligands of these receptors are small in size and hydrophobic. Inside the cell, many of these molecules bind to proteins, which act as regulators of mRNA synthesis.
So, the correct answer is option A.

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Re-Attempt Weekly Quiz Competition

Chemical Coordination and Integration Test 49

Result

Chemical Coordination and Integration Test 49

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SHARING IS CARING

Question 1

Oestrogen

FSH

Progesterone

LH

Solution

Question 2

Glycoproteins

Thyroglobulin

T3 and T4

Polycyclic hydrocarbons

Solution

Question 3

Holocrine gland

Apocrine gland

Merocrine gland

All of the above

Question 4

Protein hormones interact with the intra-cellular receptor.

Iodothyronine hormone generates secondary messenger after interaction with the receptor.

Hormone is cell specific.

Somatostatin hormone is secreted only by hypothalamus.

Question 5

fats

Hormones

Carbohydrates

Proteins

Solution

Question 6

Homozygous sex chromosomes (xx) produce male in Drosophila

Homozygous sex chromosomes (ZZ) determine female sex in birds

XO type of sex chromosomes determines female sex in grasshopper

XO condition in human as found in turner syndrome, determines females sex

Question 7

left coronary artery

hypophysial portal artery

axons of neurosecretory cells

nuclei of hypothalamus

Solution

Question 8

A second messenger

Modification of enzyme activity

Stimulation of DNA replication

Stimulation of mRNA transcription

Solution

Question 9

Binding of the hormone to the cytoplasmic receptor and the complex binds to hormone response element on DNA with promoter DNA.

Binding of the hormone to the transmembrane receptor initiates the production of the second messenger that activates enzymes which further activates transcription factors.

Binding of the hormone to the transmembrane receptor which diffuses inside the cell cytoplasm and then activates the enzyme necessary for the activation of transcription factors.

Binding of the hormone to the cytoplasmic receptor initiates the production of the second messenger which activates enzymes that further activates transcription factors.

Solution

Question 10

Cytoplasmic receptors

Membrane receptors

Both A and B

ER receptors

Solution

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