Lichens are indicators of pollution because ________

They grow in oxygen depleted regions

They don t grow in polluted regions

Their growth indicates that the region has very high carbon levels

AIDS stands for _______

Acquired Immuno Disease Syndrome

Acquired Immuno Deficiency Syndrome

Acquired Immuno Disease Syndrome

Aided Institute for Development and Sciences

Viruses contain protein coat whereas viroids don t contain protein coat

Viruses contain DNA whereas viroids don t contain DNA

Viruses contain protein coat whereas viroids don t contain protein coat

Viruses contain RNA whereas viroids don t contain RNA

Viruses are found in bacteria, animals and plants but viroids only in plants

Set-I contains radioactive sulphur in its pellet and set-II contains radioactive phosphorous in its supernatant

nWhich among the following are correct Set-I and Set-II after centrifugation?

Set-I and Set-II contains radioactive sulphur and phosphorous in their supernatant respectively

Set-I and Set-II contains radioactive sulphur in their supernatant

Set-I contains radioactive sulphur in its pellet and set-II contains radioactive phosphorous in its supernatant

Set-I and Set-II contains radioactive sulphur and phosphorous in their pellet respectively

1.	Lichens are indicators of pollution because ________
A.	They grow in oxygen depleted regions
B.	They don t grow in polluted regions
C.	They grow in polluted regions
D.	Their growth indicates that the region has very high carbon levels
Answer» C. They grow in polluted regions

2.	RNA of the viroids is of low molecular weight when compared to viruses.
A.	True
B.	False
Answer» B. False

3.	The fungal portion in Lichens is known as _________
A.	Mycobiant
B.	Phycobiant
C.	Capsobiant
D.	Deuterobiant
Answer» B. Phycobiant

4.	AIDS stands for _______
A.	Acquired Immuno Deficiency Syndrome
B.	Acquired Immuno Disease Syndrome
C.	All India Disease Syndromes
D.	Aided Institute for Development and Sciences
Answer» B. Acquired Immuno Disease Syndrome

6.	Which among the following is not a difference between viruses and viroids?
A.	Viruses contain DNA whereas viroids don t contain DNA
B.	Viruses contain protein coat whereas viroids don t contain protein coat
C.	Viruses contain RNA whereas viroids don t contain RNA
D.	Viruses are found in bacteria, animals and plants but viroids only in plants
Answer» B. Viruses contain protein coat whereas viroids don t contain protein coat

7.	Viruses are smaller than viroids.
A.	True
B.	False
Answer» C.

8.	Read the following paragraph and answer the following question. Hershey-Chase experiment broke the barriers of science and expanded the understanding of life. In this experiment, two sets of bacteriophages are used in which one contains radioactive sulphur in its protein coat (Set-I) and other contains radioactive phosphorus in its DNA (Set-II). These two sets were allowed reproduce in E.Coli culture and then centrifuged.
A.	nWhich among the following are correct Set-I and Set-II after centrifugation?
B.	Set-I and Set-II contains radioactive sulphur and phosphorous in their supernatant respectively
C.	Set-I and Set-II contains radioactive sulphur in their supernatant
D.	Set-I contains radioactive sulphur in its pellet and set-II contains radioactive phosphorous in its supernatant
E.	Set-I and Set-II contains radioactive sulphur and phosphorous in their pellet respectively
Answer» D. Set-I contains radioactive sulphur in its pellet and set-II contains radioactive phosphorous in its supernatant