Biology Mcqs Test No 4


There are 10 Mcqs.Choose the best option.Write all of your answers in one comment (like 1A,2B,3B...)

(1)Which component of tobacco smoke affects blood pressure?
A carbon dioxide
B carbon monoxide
C nicotine
D tar

(2)Which factors would help prevent which disease?
1 covering water containers
2 disinfecting and chlorinating water
3 use of antiviral drugs
4 vaccination
prevent disease


(3) The diagram shows some chemical conversions during the nitrogen cycle.
nitrogen cycle mcq

(4) What is the correct match of example to ecological term?
ecosystem mcq


(5) What are always present in prokaryote cells?
A capsules
B flagella
C pili
D ribosomes

(6) The following are all features of eukaryotic cells.
1 chloroplast
2 endoplasmic reticulum
3 lysosome
4 mitochondrion
5 nucleus
Which of these has a double membrane?
A 1, 2 and 4
B 1, 3 and 5
C 1, 4 and 5
D 2, 3 and 5

(7) Which molecule in the key is sucrose?
sucrose mcq


(8) Which level of protein structure maintains the globular shapes of enzymes?
A primary
B secondary
C tertiary
D quaternary

(9) Which substances contain carbon, hydrogen, oxygen and nitrogen?
1 collagen
2 amylopectin
3 deoxyribonucleic acid
A 2 only
B 1 and 3 only
C 2 and 3 only
D 1, 2 and 3

(10) Which of the following ways of moving substances across cell surface membranes allows movement in both directions?
1 active transport
2 diffusion
3 facilitated diffusion
4 osmosis
A 2 only
B 1 and 4 only
C 2 and 3 only
D 1, 2, 3 and 4

(11) For organisms undergoing sexual reproduction, a reduction division occurs before fertilisation. Which reasons explain why this is necessary?
1 increase genetic variation
2 prevent doubling of the chromosome number
3 reduce the chances of mutation
A 1 only
B 2 only
C 2 and 3 only
D 1, 2 and 3


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