In Trypanosoma, some of the introns generate Y shaped structure in place of a lariat. Such structure is generated during
Anonymous Poll
11%
cis-splicing
55%
trans-splicing
29%
alternate splicing
6%
RNA editing
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In both males and females, the gonads secrete a polypeptide hormone, called inhibin B, which inhibits
Anonymous Poll
20%
luteinizing hormone
59%
follicle-stimulating hormone
9%
prolactin
12%
thyroid-stimulating hormone
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Autogamy refers to
Anonymous Poll
9%
self-abortion of gametes
6%
flower failing to open
84%
self-pollination of flowers
2%
cross-pollination of flowers
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Electron transfer from donors such as NADH and FADH2 to O2 occurs in
Anonymous Poll
35%
membranes of ER, chloroplast and mitochondria
10%
chloroplast only
27%
mitochondria only
28%
organellar membranes which possess ATP synthase
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Which one of the following statements regarding double fertilization in plants is correct?
Anonymous Poll
12%
The same sperm cell fuses with both egg cell and central cell.
9%
Two sperm cells fuse with the egg cell.
77%
One sperm cell fuses with the egg cell and second with the central cell.
2%
Two sperm cells fuse with the central cell.
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Which one of the following ensures stable binding of RNA polymerase at the promoter site?
Anonymous Poll
7%
DNA photolyase
72%
Sigma factor
13%
DNA glycosylase
8%
Rec A
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Which one of the following conditions will switch on Lac operon in E. coli?
Anonymous Poll
16%
+ Glucose, + Lactose
27%
+ Glucose, - Lactose
7%
- Glucose, - Lactose
50%
- Glucose, + Lactose
A student added DMEM culture medium which was pink in colour to growing liver cells. Three days later the medium colour was yellow. This indicated
Anonymous Poll
6%
change in cell morphology
54%
change in pH of the medium
32%
depletion of nutrients in the medium
8%
lack of antibiotics in the culture
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According to Hamilton's rule, ‘r’ is the coefficient of relatedness between two interacting individuals, 'B' is the benefit to the recipient and 'C' is the cost to the donor. Which of the following relationships will result in an altruistic behaviour?
Anonymous Poll
12%
rB = C
29%
rC-B = 0
52%
r> C/B
8%
rC-B>0
The major structural characteristic of avian gastrulation is the primitive streak, which becomes the blastopore lips of amniotic embryos. Migration through the primitive streak is controlled by Fgf8. What would happen if the Fgf8 protein, which repels mig
Anonymous Poll
9%
The yolk sac will be deformed.
67%
Wnt signalling will be activated and orientation of the primitive streak will change.
18%
Cells of the streak will not form the paraxial mesoderm.
6%
Cells generate mesodermal portions of the embryo.