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TLS Online TPP Program

#Question id: 3421

Following figure show fitness variation the presence of natural selection and frequency of genotype before natural selection. What will be effect on the frequency of phenotype? (Y axis- Frequency of genotype, X axis – phenotype)

#Unit 11. Evolution and Behavior

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TLS Online TPP Program

#Question id: 1801

#Unit 4. Cell Communication and Cell Signaling

Which of the following is the earliest site of hematopoiesis in the embryo?
TLS Online TPP Program

#Question id: 3427

#Unit 11. Evolution and Behavior

Natural selection can alter the frequency of distribution allele and heritable trait in different following way

A- Accumulation of those mutation that increase fitness of population in changing environment

B- Check accumulation of mutation that lower the fitness of species in unchanging environment

c- occur when population is subjected to divergent selection
TLS Online TPP Program

#Question id: 1006

#Unit 1. Molecules and their Interaction Relevant to Biology

Four of the ten enzymes required for the biosynthesis of IMP are listed below. In which order do the reactions these enzymes catalyze occur during the synthesis of IMP?

1. IMP cyclohydrolase

2. GAR synthase

3. glutamine-PRPP amidotransferase

4. AIR carboxylase
TLS Online TPP Program

#Question id: 13206

#Unit 6. System Physiology – Plant

Given below are some of the statements that regulate the sucrose loading mechanism;
A) The solute potential or, more likely, the turgor pressure of the sieve elements
B) Sucrose concentration in the apoplast
C) The available number of symporter protein molecules
Possible observation given on how to avoid regulation;
i) increase in sieve element turgor above a certain threshold would lead to a compensatory increase in loading
ii) High sucrose concentrations in the apoplast would increase phloem loading
iii) SUT1 transporter mRNA and protein have been lower after 15 hours of darkness than after a light treatment. These data suggest that the concentration of SUT1 transporter molecules could regulate loading
iv) Decrease in sieve element turgor below a certain threshold would lead to a compensatory increase in loading
v) The transporter mRNA and protein high in darkness than lower in the light treatment
Which of the following combinations represents correct observation?
TLS Online TPP Program

#Question id: 5617

#Unit 5. Developmental Biology

In sea urchins and mammals, the rise in Ca2+ concentration responsible for the cortical granule reaction is due to