Biology Past Questions

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741

The nitrifying bacteria, Nitrosomonas, convert ammonia to

A. nitirites
B. nitric acid
C. niitrates
D. nitrous oxide

View Answer & Discuss (2) JAMB 1994

742

The activity of ptyalin is likely to decrease with an increase in concentration of

A. oxygen
B. starch
C. protein
D. acid

View Answer & Discuss (5) JAMB 1994

743

The phloem parenchyma is sometimes used for

A. food storage
B. supporting the stem
C. production of the sieve tube
D. transporting water

View Answer & Discuss (12) JAMB 1994

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744

The process by which a red blood cell placed in distilled water absorbs water until it burst and releases its contents into the surrounding is known as

A. osmosis
B. plasmolysis
C. turgidity
D. haemolysis

View Answer & Discuss (7) JAMB 1994

745

The most appropriate title for the set up is

A. quantitative measurement of respiration in plants and animals
B. measurement of respiratory rates in living organisms
C. comparison between photosynthesis and respiration
D. comparison of respiratory rates in plants and animals

View Answer & Discuss (3) JAMB 1994

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