11.Cryptorchidism is a condition of testes in which it is
(a) unable to descend in scrotal sac
(b) unable to produce sperms
(c) has been surgically removed
(d) remain undeveloped
12.Archaebacteria differ from eubacteria in
(a) cell membrane structure
(b) mode of nutrition
(c) cell shape
(d) mode of reproduction
13.Which character is not similar in all living organisms?
(a) Similar genetic code of amino acids
(b) Energy storage in ATP
(c) Type of proteins in the body
(d) Protein synthesis in ribosome
14.Haploids are more suitable for mutation studies than
diploids. This is because
(a)haploids are reproductively more stable than diploids
(b)mutagens penetrate in haploids more effectively than in
diploids
(c)haploids are more abundant in nature than diploids
(d)all mutations whether dominant or recessive are expressed
in haploids
15.Which of the following is a hormone releasing
Intra Uterine Device (IUD)?
(a) Multiload 375 (b) LNG 20
(c) Cervical cap (d) Vault16.Cyathium inflorescence shows
(a)scorpoid cyme showing central female, many peripheral
male flowers
(b)scorpoid cyme showing central male, many peripheral
female flowers
(c)dichasial cyme showing two whorls, one of male and
another of female flowers
(d)dichasial cyme showing two whorls of 3-9 flowers
17.Which of the following product is obtained
commercially from Monascus purpureus?
(a) Citric acid
(b) Blood cholesterol lowering statins
(c) Ethanol
(d) Streptokinase for removing clots from the blood vessels
18.Which one of the following is gaseous biogeochemical
cycle in ecosystem?
I.Sulphur cycle II. Phosphorus cycle
III. Nitrogen cycle IV. Carbon cycle
Choose the correct one from the codes given below.
(a) I, II and IV (b) II and IV
(c) I, II and III (d) III and IV
19.Which of the following is not the modification of tap
root system?
(a) Napiform (b) Fusiform
(c) Tuberous (d) Bulbil
20.Role of nucleus in plant morphogenesis was studied by
(a) Hammerling (b) Melchers
(c) Khorana (d) Robert Brown
21.Geitonogamy involves
(a)fertilisation of a flower by the pollen from another flower of
the same plant
(b)fertilisation of a flower by the pollen from the same flower
(c)fertilisation of a flower by the pollen from a flower of another
plant in the same population
(d)fertilisation of a flower by the pollen from a flower of another
plant belonging to a distant population
22.Dwarf pea plant was treated with gibberellic acid, it
became tall, as tall plants. If these pea plants are
crossed with pure tall plants, what will be the
phenotypic ratio in F 1 -generation.
(a) 50% tall and 50% dwarf plants
(b) 75% tall and 25% dwarf plants
(c) All dwarf plants
(d) 100% tall plants
23.Consider the following five statements.
I.In Equisetum, the female gametophyte is retained
on the parent sporophyte.
II. In Ginkgo, male gametophyte is not independent.
III. The sporophyte in Riccia is more developed than
that in Polytrichum.
IV. Sexual reproduction in Volvox is isogamous.
V.The spores of slime moulds lack cell walls.
How many of the above statements is/are correct?
(a) Four (b) One (c) Two (d) Three
24.Failure of a pair of homologous chromosomes to
separate in anaphase-I of meiosis is referred to as:
(a) Non-disjunction (b) Disjunction
(c) Transformation (d) Transduction
25.Which of the following hormones are secreted by
human placenta?
I.hCG II. hCS III. hCT
(a) I and II (b) I and III (c) II and III (d) I, II and III
26.Consider the following four statements.
I.The sporophyte in liverworts is more elaborate than
that in mosses.
II. Salvinia is heterosporous.
III. The life-cycle in all seed-bearing plants is diplontic.
IV. In Pinus, male and fe male cones are borne on
dif fer ent trees.
The two wrong statements together are
(a) I and III (b) I and IV (c) II and IV (d) I and II
27.Pheretima and its close relatives derive nourishment
from
(a) soil insects
(b) small pieces of fresh fallen leaves of maize, etc
(c) sugarcane roots
(d) decaying fallen leaves and soil organic matter
28.Which of the following combination represents the
vector of cloning capacity of DNA from smaller to bigger
(a) BAC, YAC, plasmid, cosmid
(b) Plasmid, BAC, YAC, cosmid
(c) YAC, plasmid, BAC, cosmid
(d) Plasmid, cosmid, BAC, YAC