MHT-CET Paper 2016 Biology Version 11
In Angiosperms, megaspores formed after meiosis of megaspore mother cell are arranged in ____________
(a) Isobilateral tetrad
(b) Linear tretard
(c) Tetrahedral tetrad
(d) T-shaped tetrad
b
During replication of DNA, the two stands of the double helix are separated from each other under the influence of enzyme _____
(a) rep-protein
(b) SSBP
(c) initiator protein
(d) DNA polymerase
a
High levels of Aspartic acid, low nitrogen and suga content in maize plants prevent the attack by ________
(a) Aphids
(b) Jassids
(c) Boll worms
(d) Stem borers
d
The common feature in CAM and C4 plants is
(a) Stomata open only during night
(b) Acid concentration increases during night
(c) Both C3 and C4 pathway occur
(d) Having Kranz anatomy
c
Which one of the following electron acceptor is present in respiratory chain?
(a) Cytochrome f
(b) Cytochrome a3
(c) Plastocyanin
(d) Ferredoxin
b
When genomic DNA is fragmented and cloned, the screening of the desired gene is done by using
(a) Plasmid DNA
(b) DNA probes
(c) Southern blotting
(d) PCR technique
b
The guano deposits are obtained from the excreta of _______
(a) Reptiles
(b) Human
(c) Marine birds
(d) Micro-organisms
c
In an angiosperm a female plant having 2n=24 is crossed with a male plant having 2n=12 what will be the chromosome number of the endosperm?
(a) 12
(b) 18
(c) 24
(d) 30
d
Two alternative forms of a gene or alleles are located on _________
(a) Identical loci of the same chromosome
(b) Non-identical loci of the same chromosome
(c) Identical loci of homologous chromosomes
(d) Non-identical loci of homologous chromosomes
c
Mycorrhiza is _______
(a) Alga
(b) Fungus
(c) Bacteria
(d) Virus
b
During PCR technique, the pairing of primers to ssDNA segment is called ____
(a) Denaturation
(b) Annealing
(c) Polymerisation
(d) Isolation
b
__________ is the most convenient and cheap method of artificial vegetative propagation.
(a) Grafting
(b) Budding
(c) Cutting
(d) Micropropogation
c
Glycosideic bond exists in DNA molecule between ________
(a) Sugar and Phosphate
(b) Any two nitrogen bases
(c) Sugar and nitrogen base
(d) Purines and pyrimidines
c
Which of the following wall layer of anther shows fibrous thickenings of callose ?
(a) Epidermis
(b) Tapetum
(c) Middle layer
(d) Endothecium
d
Photosynthesis is considered as an oxidation reaction because ______
(a) CO2 is oxidised
(b) H2O is oxidised
(c) O2 is released
(d) CH2O is oxidised
b
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