Biology MCQs

11. Photosynthesis generally occurs in which portions of the plant? (UPSC Prelims 1987)
[A] Leaf and other chloroplast bearing parts
[B] Steam and leaf
[C] Roots and chloroplast bearing parts
[D] Bark and leaf

Show Answer

12. In a bisexual flower, if androecium and gynaecium mature at different times, which of the following is the name given to the phenomenon? (UPSC Prelims 2002)
[A] Dichogamy
[B] Herkogamy
[C] Heterogamy
[D] Monogamy

Show Answer

13. Phototropism Theory is related to which of the following scientist?
[A] Jane Goodall
[B] Charles Darwin
[C] Francis Galton
[D] None of these

Show Answer

14. Which of the following is a reducing sugar?
[A] β-methyl galactosidase
[B] Sucrose
[C] Gluconic acid
[D] Galactose

Show Answer

15. What are the inclusion bodies of the measles virus?
[A] intracytoplasmic
[B] intranuclear
[C] both (a) and (b)
[D] none of these

Show Answer

16. Which of the following materials are acted upon by putrefying bacteria?
[A] Fat
[B] Protein
[C] Carbohydrate
[D] Vitamins

Show Answer

17. Bryophytes comprise__?
[A] The sporophyte is of longer duration
[B] Dominant phase of sporophyte which is parasitic
[C] Dominant phase of gametophyte which produces spores
[D] Small sporophyte phase and generally parasitic on the gametophyte

Show Answer

18. The patterns of arrangement of leaves on the stem are called__?
[A] phyllotaxy
[B] Phyllode
[C] Leaf Roots
[D] Scale Leaves

Show Answer

19. In anaerobic respiration, glucose is broken down into what?
[A] ethyl alcohol
[B] carbon dioxide
[C] energy
[D] All of the above

Show Answer

20. Which of the following statements is true about the root modification?
[A] The temporary change in the root structure
[B] The permanent changes in the root structure
[C] The permanent changes in the internal root structure
[D] The temporary changes in the external root structure

Show Answer