BIOLOGY

1. Photosynthesis takes place faster in
A. yellow light
B. white light
C. red light
D. darkness
Ans - B

2. Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by
A. Robert Hooke
B. Robert Brown
C. Rudolf Virchow
D. Theodore Schwann
Ans - B

3. Primary phloem develops from
A. lateral meristem
B. protoderm
C. extrastelar cambium
D. provascular tissue
Ans - D

4. Other than spreading malaria, anopheles mosquitoes are also vectors of
A. dengue fever
B. filariasis
C. encephalitis
D. yellow fever
Ans - B
 
5. Plants that grow in saline water are called
A. halophytes
B. hydrophytes
C. mesophytes
D. thallophytes
Ans - A

6. Pyorrhoea is a disease of the
A. nose
B. gums
C. heart
D. lungs
Ans - B

7. O2 released in the process of photosynthesis comes from
A. CO2
B. water
C. sugar
D. pyruvic acid
Ans - B

8. Placenta is the structure formed
A. by the union of foetal and uterine tissue
B. by foetus only
C. by fusion of germ layers
D. None of these
Ans - A
 
9. Plants hormone that induces cell division is
A. auxins
B. gibberellins
C. kinins
D. domins
Ans - C

10. Neurospora is used as genetic material because
A. it has short life cycle of 10 days
B. the product of single meiosis can be easily analysed
C. meiotic products are linearly arranged in the form of ordered tetrads
D. is a diploid fungus
Ans - A