Chemical Coordination and Integration Test 53

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Chemical Coordination and Integration Test 53

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not a salivary gland?

A
Parotid

B
Sublingual

C
Mandibular

D
Pituitary gland

Solution

Three pairs of salivary glands are present in the buccal cavity, namely, the parotid, the sublingual and the mandibular.
Pituitary gland is a part of the brain and is also known as the master gland as it controls all the activities of the body by releasing various hormones.
So, the correct answer is 'Pituitary gland'
Question 2
1 / -0

Snail moves with the help of its:

A
Shell

B
Bone

C
Muscular foot

D
Whole body

Solution

$$\textbf{Correct option:}$$ Option C

$$\textbf{Explanation for correct option:}$$
Option C
$$\bullet$$ The snail is a soft-bodied animal.
$$\bullet$$ A snail moves only with the help of a muscular foot.

$$\textbf{Explanation for incorrect options:}$$
Option A: The shell provides protection to the body of the snail.

Option B: Snails do not have a skeletal system.

Option D: Only the foot is responsible for the movement of the snail, not the entire body.

$$\textbf{Conclusion:}$$ Snail moves with the help of its muscular foot.
Question 3
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Which hormone is produced by pineal gland?

A
Gonadotropic hormone

B
Melatonin

C
Adrenaline

D
Thyroxin

Solution

Pineal gland is a small pea shaped endocrine gland situated at the base of the brain. It secretes melatonin or sleep hormone.
Question 4
1 / -0

Which gland is situated above kidneys?

A
Pituitary gland

B
Thyroid gland

C
Adrenal gland

D
Pancreas

Solution

Adrenal gland is attached at the anterior end of the kidney.
Question 5
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Which of the following is responsible for regulation of circadian variations?

A
Thyroid gland

B
Pancreas

C
Adrenal gland

D
Pineal gland

Solution

Pineal gland secretes hormone Melatonin that responds to darkness and regulates the circadian variations, like falling asleep during night.
So, the correct answer is 'Pineal gland'
Question 6
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Which of the following hormones is not secreted by pituitary gland?

A
Growth hormone

B
Vasopressin

C
Melatonin

D
Prolactin

Solution

Melotonin is secreted by the pineal gland and controls circadian rhythms by responding to darkness.
Growth hormone, Vasopressin and Prolactin is secreted by the pituitary gland.
So, the correct answer is 'Melatonin'
Question 7
1 / -0

Which of the following glands is large sized at birth but reduces in size with aging?

A
Pineal

B
Pituitary

C
Thymus

D
Thyroid

Solution

Thymus is a lymphoid gland behind the breast bone. The T-lymphocytes complete their development in the thymus gland. This gland undergoes atrophy at puberty.
So, the correct answer is 'Thymus'
Question 8
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Which of the following is not a lymphoid tissue?

A
Spleen

B
Tonsils

C
Pancreas

D
Thymus

Solution

Spleen, Tonsils and Thymus are lymphoid tissues and play a role in defending the body against pathogens.
Pancreas is a gland, which is both exocrine and endocrine. It secretes hormones like insulin and Glucagon and also pancreatic juice for digestion.
So, the correct answer is 'Pancreas'
Question 9
1 / -0

At cellular level, GH affects growth by controlling the production of

A
r-RNA

B
t-RNA

C
m-RNA

D
None of the above

Solution

mRNA levels are high during log-phase of growth in glucose medium, low in post-diauxic cells growing on ethanol and slightly lower still in cells in stationary phase. mRNA levels are induced by glucose in a process, that involves transcriptional control, and requires metabolism of the glucose.
Therefore, the correct answer is option C.
Question 10
1 / -0

Estrogen and testosterone are steroid hormones, and are most likely to bind

A
Membrane ion channels

B
Enzyme-linked membrane receptors

C
G-protein linked membrane receptors

D
Cytoplasmic receptors

Solution

Steroid hormone receptors are found on the plasma membrane, in the cytosol and also in the nucleus of target cells. They are generally cytoplasmic intracellular receptors and initiate signal transduction for steroid hormones, which lead to changes in gene expression. These are able to pass the hydrophobic environment of the plasma membrane and bind to the cytoplasmic receptors and further alters the gene expression.
So, the correct answer is option D.

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Chemical Coordination and Integration Test 53

Result

Chemical Coordination and Integration Test 53

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SHARING IS CARING

Question 1

Parotid

Sublingual

Mandibular

Pituitary gland

Solution

Question 2

Shell

Bone

Muscular foot

Whole body

Solution

Question 3

Gonadotropic hormone

Melatonin

Adrenaline

Thyroxin

Solution

Question 4

Pituitary gland

Thyroid gland

Adrenal gland

Pancreas

Solution

Question 5

Thyroid gland

Pancreas

Adrenal gland

Pineal gland

Solution

Question 6

Growth hormone

Vasopressin

Melatonin

Prolactin

Solution

Question 7

Pineal

Pituitary

Thymus

Thyroid

Solution

Question 8

Spleen

Tonsils

Pancreas

Thymus

Solution

Question 9

r-RNA

t-RNA

m-RNA

None of the above

Solution

Question 10

Membrane ion channels

Enzyme-linked membrane receptors

G-protein linked membrane receptors

Cytoplasmic receptors

Solution

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