CBSE Guess > Papers > Question Papers > Class XII > 2005 > Biology > Compartment Delhi Set-II

BIOLOGY 2005 (Set II—Compartment Delhi)

Except for the following questions alt the remaining questions have been asked in Set I.

SECTION - A
Q. 1. State any one signification of interspecific hybridization in plants. 1

Q. 5. State one artificial condition, which may stop non-cyclic photophosphorylation and trigger.cyclic photóphosphorylation. 1

SECTION - B
Q. 7. What is inbreeding? Name the extreme form of inbreeding. What happens to the recessive alleles in this process? 2

Q. 8. Name the plants hormone that inhibits plant growth and metabolism. What is the rle of this hormone in seed development.
Or
Name and describe the type of vegetative reproduction usually employed in propagating orange, litchi, etc.

Q. 13. Bile juice contains no digestive enzymes, yet it is important fro digestion. Explain. 2

Q. 15. What is oxidative decarboxylation of pyruvic acid? When does it occur? 2

SECTION - C
Q. 16. Describe how the blood transports CO2 from tissues to the lungs. 3

Q. 18. Explain how CO2 concentration in increased in the bundle sheath cells of C4 plants for photosynthesis. 3
Q. 20. Draw a diagram of the L.S. of a mature angiospermic (anatropous) ovule. Label any six parts. 3
Or
Draw a diagram of the transverse section of an angiospermic anther. Label any six parts. 1

SECFION - D
Q. 26. Describe the detailed structure of skeletal muscle. Name its two types and mention any two differences between them.
Or
Explain the mechanism of muscle contraction by sliding filament theory. 5