Science and Environment Quiz: Day 135

April 6, 2023

Gibberellins cause:

(A) Shortening of genetically tall plants
(B) Elongation of dwarf plants
(C) Promotion of rooting
(D) Yellowing of young leaves

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Answer : B

Which one of the following glands produces the growth hormone (somatotrophin)?

(A) Adrenal
(B) Pancreas
(C) Pituitary
(D) Thyroid

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Answer : C

Consider the following statement:
1 Pituitary gland is divided into four lobes.
2. Estrogen is secreted by corpus luteum
3. The deficiency of insulin causes Diabetes Mellitus
Which of the above is/are incorrect

(A) Only 1
(B) Only 2 and 3
(C) Only 1 and 2
(D) All of these

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Answer : C

Match the following
A. Thyroxine - 1.- Tetany
B. ADH - 2.- Acromegaly
C. Parathormone - 3.- Diabetes insipidus
D. Growth hormone - 4.- Simple goitre
Choose the correct code:

(A) A-3, B-4, C-1, D-2
(B) A-3, B-4, C-2, D-1
(C) A-4, B-3, C-1, D-2
(D) A-4, B-3, C-2, D-1

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Answer : C

Identify the exocrine gland

(A) Pituitary gland
(B) Adrenal gland
(C) Salivary gland
(D) Thyroid gland

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Answer : C

To increase the sugar production in sugarcanes they are sprayed with _______

(A) Auxin
(B) Cytokinin
(C) Gibberellins
(D) Ethylene

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Answer : B

Which one of the following hormones is essential for the uptake of glucose by cells in the human body?

(A) GH
(B) TSH
(C) Insulin
(D) Cortisol

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Answer : C

Assertion: Application of cytokinin to marketed vegetables can keep them fresh for several days.
Reason: Cytokinins delay senescence of leaves and other organs by mobilisation of nutrients

(A) If both assertion and reason are true and reason is the correct explanation of assertion.
(B) If both assertion and reason are true but reason is not the correct explanation of assertion.
(C) If assertion is true but reason is false.
(D) If assertion is false but reason is true.

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Answer : A

Which one of the following hormones is naturally not found in plants

(A) 2, 4-D
(B) GA3
(C) Gibberellin
(D) IAA

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Answer : A

Synthetic Auxins: Artificially synthesized

auxins that have properties like auxins

are called as synthetic auxins. Example: 2,

4 D (2,4 Dichlorophenoxy Acetic Acid)

Effect of Green House Gas (GHGs) on ‘climate change’ depends on-
1. How much of these gases are in the atmosphere.
2. How long they stay in the atmosphere.
3. How strongly they impact global temperatures.
Select the correct answer using the code given below:

(A) 3 only
(B) 2 and 3
(C) 1 and 3
(D) 1, 2 and 3

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Answer : D

Where can we commercially use the sequestrated CO2?
1. In Horticulture.
2. For dry ice production.
3. For developing new kind of plastic.
Select the correct answer using the code given below:

(A) 1 only
(B) 1 and 2 only
(C) 2 only
(D) 1, 2 and 3

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Answer : D

Consider the following statements related to the processes occurs in ecosystem:
1. Humification occur during decomposition in the soil which leads to accumulation of a dark colored amorphous substance.
2. Decomposition is largely an oxygen requiring process.
3. Mineralisation is the process by which substance become more concentrated in the bodies of consumers as one moves up the food chain.
Which of the above statements is/are correct?

(A) 1 and 2 only
(B) 2 and 3 only
(C) 1 only
(D) 1, 2 and 3

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Answer: A

Which of the following causes Forest fire?
1. Lightning
2. Rubbing of dry bamboos with each other
3. Dry pine needles or leaves falling on electric pole
Select the correct answer code:

(A) 1, 2 only
(B) 1, 3 only
(C) 2, 3 only
(D) 1, 2 and 3

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Answer : C

Consider the following statements regarding Biochemical Oxygen Demand (BOD):
1. The polluted water has less BOD than cleaner water.
2. It is a measure of chemical and organic pollutants.
Which of the statements given above is/are correct?

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer : D

With reference to Black Carbon, consider the following statements:
1. It is a black sooty material which emanates from burning of fossil fuels.
2. It can hasten the melting of snow in polar regions of Earth.
Which of the statements given above is/are correct?

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

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Answer : C