1
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
A hypothetical plant species shows two flower colour phenotypes- red and white. Red is dominant over white. In a population, this flower colour locus was found to be in HardyWeinberg equilibrium. If 490 out of a total population size of 1000 plants were found to be white-flowered, how many of the red-flowered plants will be heterozygous?
A
700
B
90
C
580
D
420
2
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Troponin controls binding of actin to myosin motor, thereby regulating muscle contraction. Binding of which metal ions to troponin is crucial for this purpose?
A
$N a$
B
$K$
C
$M g$
D
Ca
3
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1

The following word diagram depicts a food chain in a forest.

$$ \text { Trees (Aspen, willow) } \rightarrow \text { Herbivore (Elk) } \rightarrow \text { Predator (Wolf) } $$

Which is the most likely outcome of depletion in predator population?

A
Increased browsing by the herbivores stimulates the plant growth leading to increased primary productivity
B
Overgrowth of herbivore population causing reduction in tree populations and therefore, if the process continues the entire ecosystem will breakdown
C
No change in the ecosystem as the herbivore and the tree populations will continue to maintain equilibrium
D
Overgrowth of herbivore population without any change in the remaining part of the ecosystem
4
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Which of the following is the correct description of interferon?
A
A synthetic neurotransmitter used to treat neuronal diseases
B
A class of proteins secreted by B-lymphocytes that categorically attack and destroy virusinfected cells
C
Signalling molecules that interfere with its own synthesis inside a secretory cell
D
A class of proteins secreted by virus infected cells and are involved in protecting uninfected cells
EXAM MAP