Questions on BIOLOGY FOR SSC CHSL Exam

Q1. Tibia is a bone found in the ..
(a) skull
(b) arm
(c) leg
(d) face

Q2. What is the main component of bones and teeth?

(a) calcium carbonate
(b) calcium phosphate  
(c) calcium sulphate
(d) calcium nitrate
Q3. A feature of fertilization that is found only in angiosperms is that    
(a) the sperm may be carried by wind to the female organ
(b) one sperm fertilises the egg, while another combines with the polar nuclei  
(c) a pollen tube carries a sperm nucleus into the female gametophyte
(d) a chemical attractant guides the sperm towards the egg
Q4. A woman receives her-X-chromosome from  
(a) her mother only
(b) her father only
(c) both her mother and father
(d) either her mother or her father
Q5. Chromosomes are  
(a) parts of the human brain
(b) thread-like bodies that occur in the nuclei and carry the genetic code
(c) constituent of blood, which produces heat in the body
(d) none of the above
Q6. Fertilisation in frogs is    
(a) external
(b) internal
(c) both external and internal
(d) aerial
Q7. The process of evaporation occurs from
(a) Root
(b) Stem
(c) Leaf
(d) Entire ‘plants’ surface
Q8. Pollination by wind is called  
(a) Anemophily
(b) Hydrophily
(c) Zoophily  
(d) Entomophily
Q9. Which part of brain controls fine movement, maintains balance and equilibrium of the body and muscle tone in a human being?
(a) Cerebrum 
(b) Thalamus
(c) Cerebellum 
(d) Hypothalamus
Q10. The plant hormone that induces cell division is  
(a) Auxins
(b) Gibberellins
(c) Cytokinins
(d) Domains
Q11. The sex of a child is determined  
(a) at the time of sperm’s entry
(b) at the time of fertilisation of the ovum
(c) 6-7 weeks after conception
(d) in the third month of pregnancy
Q12. When both sexes are absent from a flower or are non-functional, the flower is said to be  
(a) incomplete  
(b) intersexual
(c) neuter
(d) unisexual
Q13. A disorder which is linked to the Y chromosome in humans (holandric) will  
(a) only be expressed in male whose mothers were a carrier of the gene
(b) never be passed from father to child
(c) show a pattern of skipping generations in a family
(d) be passed only from father to son
Q14. Which one of the following is not a genetic disorder?
(a) Colour blindness
(b) Down’s syndrome
(c) Haemophilia
(d) Xerophthalmia
Q15. A man receives his X-chromosome from
(a) his mother only
(b) his father only
(c) both his mother and father
(d) either his mother or his father


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