Science Quiz: Day 120

October 3, 2022

Double Fortified Salt is one of the most cost-effective opportunities to deliver critical micronutrients. Which among the following micronutrients are fortified to table salt?
1. Iodine
2. Iron
3. Chromium
Select the correct answer using the code given below.

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

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Answer – B

The term Epigenetics is commonly seen in the news. Which of the following statements best describes this term?

(A) It is the study of evolution of human genetics in comparison to other living objects.
(B) It is the study of behavioural changes in gene expression that occur owing to changes in the DNA sequence.
(C) It is the study of rare diseases which are caused by genetic disorders.
(D) It is the study of heritable changes in gene expression that do not involve changes to the underlying DNA sequence.

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Answer – D

With reference to stem cells, consider the following statements.
1. They develop into different types of specialized cells in the human body.
2. They are only found inside an embryo.
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 – A

What is White-fi communication technology?

(A) It refers to use of visible light portion of electromagnetic spectrum for communication.
(B) It refers to the use of unused or underused portion of broadband frequencies for communication.
(C) It refers to the advancement in wi-fi technology that completely removes white noise.
(D) It is a solar-powered broadband wireless technology.

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Answer – B

'Totipotency' is best described as the ability of a

(A) Single cell to divide and produce all of the differentiated cells in an organism.
(B) Virus to replicate inside the body of its host.
(C) Dying cell to regain life by slowing down the process of oxidation.
(D) New organism to develop from an outgrowth or bud due to cell division at one particular site.

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Answer – A

With reference to the nanomaterials, consider the following statements:
1. An object to be classified as nanomaterial should have all the three- dimension in the nanometer scale (1-10 nm).
2. Nanomaterials can only be synthesized artificially.
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

Isotopes have the same atomic number but different atomic masses. Which among the following are the uses of radioactive isotopes?
1. Treatment of cancer
2. Fuel in nuclear reactors
3. Treatment of goitre
Select the correct answer using the code given below.

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

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Answer – D

In the context of the effects of radioactive radiation on living beings, consider the following statements:
1. Alpha particles (α) are small, fast- moving particles with a negative electrical charge that are emitted from an Atom’s nucleus during radioactive decay.
2. Beta particles (β) are positively charged lacking the energy to penetrate the skin.
3. Gamma rays (γ) are weightless packets of energy that can cause damage to the cell structure.
Which of the statements given above is/are correct?

(A) 3 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) None

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Answer – A

Which of the following organs help in eliminating excretory elements in the human body?
1. Kidneys
2. Lungs
3. Liver
4. Skin
Select the correct answer using the code given below.

(A) 1, 2 and 4 only
(B) 1, 2 and 3 only
(C) 3 and 4 only
(D) 1, 2, 3 and 4

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Answer – D

Which of the following parts of the brain is responsible for controlling body temperature and the release of hormones by the pituitary gland?

(A) Frontal Lobe
(B) Hypothalamus
(C) Medulla Oblongata
(D) Cerebellum

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Answer – B