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

1 .

Which energy source generates radioactive waste?

A)

Thermal power

B)

Hydel power

C)

Nuclear power

D)

All of the above

Correct Answer : Nuclear power

Radioactive (or nuclear) waste is a byproduct from nuclear reactors, fuel processing plants, hospitals and research facilities. Radioactive waste is also generated while decommissioning and dismantling nuclear reactors and other nuclear facilities.

2 .

Which of the following industries most closely approximates pure competition?

A)

Eectronic

B)

Steel

C)

Agriculture

D)

Clothing

Correct Answer : Agriculture

Agriculture would be a good example of a purely competitive industry.

3 .

Systems biology is mainly an attempt to

A)

understand the behavior of entire biological systems.

B)

simplify complex problems by reducing the system into smaller, less complex units.

C)

analyze genomes from different species.

D)

speed up the technological application of scientific knowledge.

Correct Answer : understand the behavior of entire biological systems.

Systems biology is mainly an attempt to understand the behavior of entire biological systems by studying interactions among its component parts.

4 .

According to cell theory, which activity is impossible?

A)

Heart cells forming from other heart cells

B)

Plants using energy from the sun

C)

Eukaryotes being in a multicellular organism

D)

Cells being formed from pure water

Correct Answer : Cells being formed from pure water

According to cell theory, Cells being formed from pure water is impossible.

5 .

Most organic compounds contain carbon and

A)

Nitrogen

B)

Hydrogen

C)

Potassium

D)

All of the above

Correct Answer : Hydrogen

Most organic compounds contain carbon, hydrogen, and sometimes other elements such as nitrogen, sulfur, oxygen, or phosphorus. All living organisms contain carbon—even bacteria.

Earlier when you were looking at the pictures, sugar was identified as organic.

6 .

What is the study of flags called

A)

Vexillography

B)

Vexology

C)

Vexillology

D)

None of the above

Correct Answer : Vexillology

The study of flags is called Vexillology and the art of flag design is called as Vexillography. The man who studies flags is called as Vexillologist.

7 .

When does Pele's Tear occur?

A)

at the time of earthquake

B)

at the time of volcanic eruption

C)

at the time of plate tectonics

D)

at the time of mountain formation

Correct Answer : at the time of volcanic eruption

Pele's tears (closest Hawaiian translation: "nÄ waimaka o pele") are small pieces of solidified lava drops formed when airborne particles of molten material fuse into tearlike drops of volcanic glass. Pele's tears are jet black in color and are often found on one end of a strand of Pele's hair.

8 .

Which is a density independent factor in controlling a population?

A)

Floods

B)

Food shortage

C)

Disease

D)

All of the above

Correct Answer : Floods

Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population, then such factor is called Density Independent Factor. It is things that the organisms have no control over.

Here in the given options, food shortage and disease are factors that are dependent on the number of population but Floods have no dependency.

Some examples of density independent factors are :: Earth quake, fires, volcanic eruptions, floods, and all natural calamities.

9 .

Primary productivity is not limited by

A)

Water

B)

Nutrients

C)

Time

D)

Availability of sunlight

Correct Answer : Time

Primary productivity is not limited by time. Primary productivity refers to plants, and their life cycle, with photosynthesis and the creation of oxygen. So, obviously, for those things plants are going to need the sunlight, as well as nutrients and water.

10 .

In oil painting, linseed oil acts as

A)

Binder

B)

Primer

C)

Pasting

D)

Wet plaster

Correct Answer : Binder