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TLS Online TPP Program

#Question id: 674

Proline is not often found in a-helices of proteins because it

#SCPH06 I Botany

  1. has a small, uncharged side chain.

  2. has a very bulky side chain.

  3. lacks a hydrogen atom on its amide nitrogen.

  4. interacts with adjacent amino acids.

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TLS Online TPP Program

#Question id: 1596

#SCPH01 Biochemistry

Which one of the following is function of Class III MHC genes?
TLS Online TPP Program

#Question id: 18593

#SCPH28 | Zoology

Some important events in the history of life on Earth are given below.
A. First dinosaurs appeared.
B. First reptiles appeared.
C. First insect fossils appeared.
D. First toothed birds appearance.
E. First wingless insect appeared.
F. Mammals like reptile arise
Match the above with the geological time periods and choose the correct combination,
TLS Online TPP Program

#Question id: 7704

#I Life Science/ Life Sciences Group – I-V

The best classification system is that which most closely ________.
TLS Online TPP Program

#Question id: 27790

#Research Methodology

 “In the strict sense observation implies the use of the eyes rather than of ear and the voice.” Stated by ________.
TLS Online TPP Program

#Question id: 12578

#SCPH06 I Botany

Refer to the following experiment, which is designed to test the co evolutionary relationships among an unpalatable butterfly (the  monarch),  a  palatable  butterfly  (the  viceroy),  and  a  butterfly  predator  (the  jay).  Monarch butterflies are reared on three diets: milkweed (their natural food), cabbage, and cabbage treated with an extract from milkweed leaves. Viceroy butterflies, mimics of monarchs, also are reared on three diets: willows (their natural food), cabbage, and cabbage treated with an extract from milkweed leaves. In trial 1 of the first experiment, adult butterflies reared on a particular diet are presented one at a  time  at  1-hour  intervals  to  jays  and  the  jays  are  allowed  to  feed.  Each jay is  fed  until  it refuses to eat the butterfly presented, but no more than 12 butterflies are presented to a jay during a particular test. Five birds are used for each test; therefore, up to 60 butterflies can be consumed for each diet test. The observer records the actual number of butterflies  eaten. In trial 2, the experiment is repeated 2 weeks later. In the second experiment, the butterflies are reared on the same diets as in experiment 1. However, when they are offered to jays, some jays receive a monarch  reared  on  milkweed  before  being  offered  the  butterflies  reared  on  the  experimental  diets;  the  other  group  of jays is  first given a viceroy reared on willow before being  offered the butterflies reared on the experimental diets. The initial butterfly offered is included in the total number eaten, but no more than 12 butterflies are presented to each jay

Which of the following supports the hypothesis that viceroys receive protection from predation because they resemble monarchs?