Multiple Choice QuestionsCompetitions for mates and variances in fitness is higher among females than among males in which of the following animals mating systems?
Monogamy
Polygyny
Polyandry
Sequential monogamy
C.
Polyandry
These patterns will be opposite in sex-role-reversed species, where males become the liminting sex and there is greater variance in success in competitions for the mates among females than males. Additionally, whereas sex is costly for both sexes, females appear to bear is costly for both sexes, females appears to bear the dharp end of this expense. Aside from the energy and time expenditure required to engage in copopulation, polyandrous females may, for example, experience greater predation, ne injured and have reduced longevity as a consequence of the receipt of caustic male seminal fluids.
Which one of the following will have the least impact on allele frequencies in small population?
Inbreeding
Random mating
Genetic drift
Outbreeding
Given below is a marker profile for two parental lines (P1 and P2) and their derived F1 progeny:
The marker that is represented in the above fiqure is most likely to be:
RFLP or SSR
SSR only
SSR or RAPD
RAPD only
DNA vaccines offer several advantages over other existing vaccine approaches. Which one of the following statements related to DNA vaccines is not correct?
The immune response is directed to the antigen encoded by the DNA and able to induce both humoral and cell-mediated immunity
DNA vaccine can induce prolonged expression of the antigen, enchancing the induction of immunological memory
DNA vaccine could remains stable and potent for long time without refrigeration, eliminating the challenges of storage and transportation
DNA vaccines construct can be engineered to carry several antigen to infect host and replicate in neuronal cells.
The following cassette was designed to create estrogen receptors knoc-out mice:
SoH: site of homology; GoI; gene of interest
What would ensure that proper recombination has taken place?
Cells survive when cultured in presence of only G418
Cells survive when cultured in presences of G418 followed by ganciclovir
Cells die when cultured in presences of G418
Cells survive when cultured with G418 and die when cultured with ganciclovir
Detergents at low concentration generally do not denature protein and are thus used for extracting proteins in their field folded and active form. For isolation of 'Porins", an E.coli membrane proteins, which one of the following purification approaches will be most appropirate?
Use of low concentration of non-ionic detergents without salt
Use of low concentration of ionic detergents
Use of salt solution containing non-ionic detergents
use of salts solution containing ionic detergents
Choose the correct answer from the statements indicate below
Chi square test is parametric
Non-parametric test assumes normal distribution
Result can be significantly affected by outlier in a parametric test.
Non-parametric test is more powerful as compared to parametric test.
Which one of the following statements regarding restriction/ modifying enzymes used in recombinat DNA technology is correct?
Endonucleases remove nucleases remove nucleotides, one at a time, from the ends of a sequences.
Type II class of restriction enzymes do not recoginse palindromic sequences
Mung bean nuclease acts on double stranded DNA or RNA termini
Type II class of restriction enzymes can generate either "sticky" or blunt ends.
For the following set observed values [60,65,65,70,70,70,70,82,85,90,95,95,100,160,160]
Which of the statements is true?
mode<median<mean
mode<mean<meadian
mean<median<mode
median<mode<mean
A circular running track has six lanes, each 1m wide. How far ahead 9in meters) should the runner in the outermost lane start from, so as to cover the same distance in one lap as the runner in the innermost lane?
6π
10π
12π
36π
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