Biology

Question 1

1Genetic engineering involves

Easy

A. transferring genes from one organism to another B. cross-pollination only C. grafting D. composting

Question 2

2Insulin for diabetics is now produced using

Easy

A. plants B. chemical synthesis only C. genetically modified bacteria D. cow blood only

Question 3

3Biogas digesters produce methane from

Easy

A. rocks B. sunlight C. water D. organic waste by bacteria

Question 4

4Restriction enzymes in genetic engineering are used to

Hard

A. copy DNA B. destroy cells C. join DNA fragments D. cut DNA at specific base sequences

Question 5

5In treating drinking water, alum is added mainly to

Easy

A. kill all germs B. make suspended particles clump and settle C. raise the temperature D. add flavour

Question 6

6Growing many identical plants from small pieces of tissue in a sterile nutrient medium is

Easy

A. crop rotation B. tissue culture C. grafting D. cross-pollination

Question 7

7Yeast is used in bread-making because it produces

Easy

A. salt B. starch C. carbon dioxide that makes the dough rise D. oxygen

Question 8

8The antibiotic penicillin is produced by a

Easy

A. fungus (Penicillium) B. virus C. plant D. animal

Question 9

9Human insulin for diabetics is now produced by bacteria using

Easy

A. selective breeding B. tissue culture C. fermentation of cassava D. genetic engineering (recombinant DNA technology)

Question 10

10Bread dough rises because yeast

Easy

A. produces salt B. adds oxygen C. produces carbon dioxide during fermentation D. kills bacteria