Science and Technology - General Knowledge Questions

1 .

Weight

Opposition

Force

None of the above

Correct Answer : Force

In science, a push or a pull on an object is called a force. Thus, we can say that the motion imparted to objects was due to the action of a force.

2 .

The day-to-day condition of the atmosphere at a place with respect to the temperature, humidity, rainfall, wind speed, etc., is called the________________ at that place.

ecology

environment

climate

weather

Correct Answer : weather

3 .

What occurs during the digestion of protein?

Specific enzymes breakdown proteins into amino acids

Specific hormones breakdown proteins into complex starches

Specific hormones breakdown proteins into simple sugars

Specific enzymes breakdown proteins into simple sugars

Correct Answer : Specific enzymes breakdown proteins into amino acids

Protein digestion occurs in the stomach and duodenum in which 3 main enzymes :

1. Pepsin secreted by the stomach

2. Trypsin and

3. Chymotrypsin secreted by the pancreas

Break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

4 .

To evaluate a piece of media means to

communicate the information to a group of people

disseminate the contents to a wide audience

judge the purpose and message in a thoughtful way

express the main idea in a clear and specific way

Correct Answer : judge the purpose and message in a thoughtful way

5 .

Very small insoluble particles in a liquid may be separated from it by using

crystallization

centrifugation

decantation

fractional distillation

Correct Answer : centrifugation

Centrifugation is a method of separating very small insoluble particles in a liquid having different densities by spinning them in solution around an axis (in a centrifuge rotor) at high speed.

6 .

A protein that acts as a hormone is

Insulin

Estrogen

Both (a) & (b)

None of the above

Correct Answer : Insulin

A protein that acts as a hormone is INSULIN.

Insulin is a peptide hormone produced by beta cells of the pancreatic islets; it is considered to be the main anabolic hormone of the body. Insulin helps keeps your blood sugar level from getting too high or too low.

7 .

Rise in sugar levels in blood is detected by the cells of

Gall bladder

Kidney

Liver

Pancreas

Correct Answer : Pancreas

The gland called pancreas secrete two hormones and they are primarily responsible to regulate glucose levels in blood.

8 .

Who synthesized the first wholly artificial gene?

Har Gobind Khorana

J.J. Thompson

Herbert Boyer

Alexander Markham

Correct Answer : Har Gobind Khorana

Synthesis of the first complete gene, a yeast tRNA, was demonstrated by Har Gobind Khorana and coworkers in 1972.

9 .

Lipids are insoluble in water because lipids are

Zwitter ions

Neutral

Hydrophylic

Hydrophobic

Correct Answer : Hydrophobic

Lipids are soluble in solvents of low polarity, which simply means that lipids are soluble in nonpolar solvents. This solubility property is a result of the large nonpolar regions that are indicative of the lipid molecule.

10 .

Which of the following statements describes the glycemic index of foods?

an individual’s glucose/insulin ratio in a fasted state

the amount of insulin required to metabolize 100 grams of glucose

the extent to which a given food raises blood glucose and insulin levels

the glucose content of a given food

Correct Answer : the extent to which a given food raises blood glucose and insulin levels

The glycemic index or glycaemic index is a number associated with the carbohydrates in a particular type of food that indicates the effect of these carbohydrates on a person's blood glucose (also called blood sugar) level. A value of 100 represents the standard, an equivalent amount of pure glucose.

The GI represents the rise in a person's blood sugar level two hours after consumption of the food.