Latest Science and Technology General Knowledge(GK) Questions and answers

1 .

All of the following are excretory (waste) products of animals, except

A)

Carbohydrates

B)

Ammonia

C)

Uric Acid

D)

Urea

Correct Answer : Carbohydrates

2 .

Valve between the left ventricle and Aorta?

A)

Mitral valve

B)

Aortic valve

C)

Pulmonic valve

D)

Tricuspid valve

Correct Answer : Aortic valve

The Aortic valve - located between the left ventricle and the aorta

The Mitral valve - located between the left atrium and left ventricle

The Tricuspid valve - located between the right atrium and the right ventricle (and)

The Pulmonary (pulmonic) valve - located between the right ventricle and the pulmonary artery.

3 .

Most stars are at what point in their life cycles?

A)

Supernova

B)

Red Giant

C)

Protostar

D)

Main Sequence

Correct Answer : Main Sequence

A star will enjoy most of its life in the main sequence phase. At this point nuclear fusion is turning hydrogen into helium. The star is only stable because the light pressure of this energy balances out the star's gravitational collapse.

4 .

Polypeptides are assembled from

A)

Chromosomes

B)

Ribosomes

C)

Aminoacids

D)

None of the above

Correct Answer : Aminoacids

A peptide bond forms when the amino group of one amino acid bonds to the carboxyl group of another amino acid. A peptide is two or more amino acids joined together by peptide bonds, and a polypeptide is a chain of many amino acids. A protein contains one or more polypeptides.

5 .

How many commands are there in the Indian Navy?

A)

2

B)

3

C)

4

D)

5

Correct Answer : 3

The Indian Navy operates three operational Commands. They are :

1. Western Naval Command - Mumbai

2. Eastern Naval Command - Vishakhapatnam

3. Southern Naval Command - Kochi

6 .

Hormone that helps regulate calcium balance

A)

parathyroid

B)

endocrine

C)

pancreas

D)

None of the above

Correct Answer : parathyroid

Parathyroid hormone regulates calcium levels in the blood, largely by increasing the levels when they are too low. It does this through its actions on the kidneys, bones and intestine: Bones – parathyroid hormone stimulates the release of calcium from large calcium stores in the bones into the bloodstream.

7 .

Which one of the following gases is released mostly from landfills in urban areas?

A)

Oxygen

B)

Methane

C)

Nitrogen

D)

Hydrogen

Correct Answer : Methane

Decomposing waste in the landfills, by the action of microorganisms, produce methane and carbon dioxide. Landfill gas consists of 40-60% of methane and rest is carbon dioxide. Trace amount of volatile organic compounds (<1) are also present which mainly comprise of hydrocarbons.

8 .

Lacto-ovo vegetarians would not eat

A)

Meat, poultry, milk products

B)

Egg, meat and milk products

C)

Fish and egg

D)

Meat, poultry, fish

Correct Answer : Meat, poultry, fish

Lacto-ovo vegetarians who eat milk products and eggs but would not eat Meat, poultry, fish.

9 .

The fish that can taste with its whole body?

A)

Arctic tern

B)

Koala

C)

Catfish

D)

None of the above

Correct Answer : Catfish

Catfish is the fish that can taste with its whole body. The catfish has the ability to taste its food with all its body parts. As per the findings, catfish has nearly 100,000 taste buds on its body and the count exceed with large catfishes right up to 175,000 taste buds.

10 .

The most productive ecosystem in the biosphere is

A)

Tundra

B)

Open Ocean

C)

Desert

D)

Estuary

Correct Answer : Estuary