General Science Questions

Q:

At present, scientists can determine the arrangement or relative positions of genes of DNA sequences on a chromosome. How does this knowledge benefit us?

1. It is possible to know the pedigree of livestock.
2. It is possible to understand the causes of all human diseases.
3. It is possible to develop disease-resistant animal breeds.
Which of the statements given above is/are correct?

A) 1 and 2 only B) 2 only
C) 1 and 3 only D) 1, 2 and 3
 
Answer & Explanation Answer: D) 1, 2 and 3

Explanation:
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Q:

Genetic alteration probably refers to altering what

A) Genes found on ribosomes B) Genes found on chromosomes
C) Genes found on cytoplasm D) All of the above
 
Answer & Explanation Answer: B) Genes found on chromosomes

Explanation:

Genetic alteration probably refers to altering Genes found on chromosomes.

Genes_on_chromosomes1531904619.jpg image

 

Genetic alteration refers to altering DNA sequence. Gene alteration forms genetically modified products that modifies the gene sequence.

 

Genetic engineering, also called genetic modification or genetic manipulation, is the direct manipulation of an organism's genes using biotechnology.

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Q:

Iodine test is used to detect

A) Carbohydrate B) Fat
C) Protein D) Cholesterol
 
Answer & Explanation Answer: A) Carbohydrate

Explanation:

The iodine test is used to test for the presence of starch i.e, Carbohydrate.

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37 13593
Q:

Lichens are the best indicator of

A) Air pollution B) Sound pollution
C) Noise pollution D) Water pollution
 
Answer & Explanation Answer: A) Air pollution

Explanation:

1. Lichens are plants that grow in exposed places such as rocks or tree bark.

 

2.  Lichens are widely used as environmental indicators or bio-indicators. They can be used as air pollution indicators, especially of the concentration of sulfur-di-oxide in the atmosphere.  

 

3. They need to be very good at absorbing water and nutrients to grow there.

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Q:

If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because 

A) The soil of rain forest is deficient in nutrients B) Propagules of the trees in a rain forest have poor viability
C) The rain forest species are slow growing D) Exotic species invade the fertile soil of rain forest
 
Answer & Explanation Answer: A) The soil of rain forest is deficient in nutrients

Explanation:
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Q:

What happens when some charge is placed on a soap bubble?

A) Its radius decreases B) Its radius increases
C) The bubble Collapses D) The bubble expands
 
Answer & Explanation Answer: B) Its radius increases

Explanation:
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Q:

The solar tracking (moving in the sun's direction) of the sunflower is called ______.

 

A) Phototropism B) Thigmotropism
C) Hydrotropism D) Heliotropism
 
Answer & Explanation Answer: D) Heliotropism

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Q:

What is the scientific name for washing soda?

A) Sodium carbonate B) Sodium bicarbonate
C) Calcium carbonate D) Calcium bicarbonate
 
Answer & Explanation Answer: A) Sodium carbonate

Explanation:
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