Health Hazards from Radiations

Q. How does a mutagen induce mutation? Explain with examples.

Q. Regarding assertion and reason, choose the correct statement.
Assertion [A]: The damage caused inside the body from beta particles is lesser than that from the alpha particles of the same energy.
Reason [R]: Energy released by beta particles is absorbed by a larger volume of tissue because of their higher penetrating capacity, bringing comparatively smaller damages to that organ.

1. Both A and R are true and R explains A
2. Both A and R are true R does not explain A
3. A is true and R is false
4. Both A and R are false

Q. UV rays are non-ionising type and are lethal because they damage

1. Proteins
2. Pigments
3. Nucleic acids
4. All of these

Q. Which of the following can be caused ifgamma radiations penetrate the body?

1. Birth deformities
2. Unregulated replication of cells
3. DNA mutations
4. All of the above

Q. Name two main sources of nuclear radiations. How are these radiations harmful?

Q.

Radioactive wastes contribute to _____ .

1. gene mutations
2. cataracts
3. allergy
4. scurvy

Q.

The effect of today's radioactive fallout problem will be expressed in the population after few generations because:

1. Susceptibility to radiation increases with age

2. Mutated genes are frequently recessive

3. Contamination of milk supply is not cumulative

4. Infants are more susceptible to radiation

Q. UV rays are non-ionising type and are lethal because they damage

1. Proteins
2. Pigments
3. Nucleic acids
4. All of these

Q. UV rays are non-ionising type and are lethal because they damage

1. pigments
2. nucleic acid
3. proteins
4. all of these

Q.

The effect of today's radioactive fallout problem will be expressed in the population after few generations because:

1. Contamination of milk supply is not cumulative

2. Infants are more susceptible to radiation

3. Susceptibility to radiation increases with age

4. Mutated genes are frequently recessive

Q. Choose the correct statement(s) regarding background radiations.

1. It is the small level of radioactive radiation present in the environment.
2. Diagnostic imaging applications like X-rays, CT scans and gamma rays are sources of background radiations.
3. Naturally occurring radioactive elements like radon contribute to background radiations.
4. Nuclear weapons and nuclear sites do not contribute to background radiations.

Q. Regarding assertion and reason, choose the correct statement.
Assertion [A]: The damage caused inside the body from beta particles is lesser than that from the alpha particles of the same energy.
Reason [R]: Energy released by beta particles is absorbed by a larger volume of tissue because of their higher penetrating capacity, bringing comparatively smaller damages to that organ.

1. Both A and R are true and R explains A
2. Both A and R are true R does not explain A
3. A is true and R is false
4. Both A and R are false

Q. Contamination of radioactive materials are dangerous because it causes

1. Gene mutation
2. Biological magnification
3. Photochemical smog
4. Destruction

Q. Revise the sentence at [5] to make it more relevant to the overall passage.

1. Is mainly composed of dead cells, and these are constantly being replaced by newer cells.
2. NO CHANGE
3. Has already been studied by countless scientists.
4. Is mainly composed of dead cells, and thus is not of great interest to scientists.

Q. radioactive waste emits_______________ which can cause health problems like _________________

Q. Choose the correct statement(s) regarding background radiations.

1. It is the small level of radioactive radiation present in the environment
2. Diagnostic imaging applications like x-rays are CT - scan and gamma rays are sources of background radiations
3. Naturally occurring radioactive elements like radon also contribute to background radiations.
4. Nuclear weapons and nuclear sites do not contribute to background radiations

Q.

Radioactive wastes contribute to _____ .

1. Allergy

2. Gene mutations

3. Cataracts

4. All of these