NSO Level 1- Science Olympiad (SOF) Class 9: Questions 248 - 254 of 1128

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Question 248

Question

Match List-Ⅰ List-Ⅱ▾

Match the following.

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Deforestation

(i)

Costly

(B)

Selective breeding

(ii)

Loss of biodiversity

(C)

Genetic engineering

(iii)

Soil erosion

(D)

Extrachromosomal material

(iv)

Plasmids

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iii)
  • (ii)
  • (i)
  • (iv)

b.

  • (ii)
  • (iv)
  • (iii)
  • (i)

c.

  • (i)
  • (iv)
  • (ii)
  • (iii)

d.

  • (ii)
  • (i)
  • (iv)
  • (iii)

Question 249

Question

MCQ▾

The undifferentiated mass of cells is known as

Choices

Choice (4)Response

a.

Suspension

b.

Tissue

c.

Callus

d.

None of the above

Question 250

Question

MCQ▾

Disadvantages of in-situ conservation are

Choices

Choice (4)Response

a.

Difficult to control predators

b.

Genetic drift

c.

Chances of increased inbreeding

d.

All a., b. and c. are correct

Question 251

Question

MCQ▾

Which of the following is used to grow the callus?

Choices

Choice (4)Response

a.

Polyacrylamide gel

b.

Agarose gel

c.

Agar-agar gel

d.

Silica gel

Question 252

Question

MCQ▾

Restriction endonucleases cut the DNA at

Choices

Choice (4)Response

a.

in the middle

b.

restriction site

c.

3՚-end

d.

5՚-end

Question 253

Question

MCQ▾

Streptococcus is used in the production of

Choices

Choice (4)Response

a.

Alcohol

b.

Cheese

c.

Milk

d.

Bread

Question 254

Question

MCQ▾

Disadvantages of atomic energy are

Choices

Choice (4)Response

a.

Requires knowledgeable, trained and skilled person

b.

Not at all cost effective

c.

Spillage may cause health issues for many years as it is radioactive

d.

All a., b. and c. are correct

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