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TLS Online TPP Program

#Question id: 5815

In the Ames test:

#Unit 8. Inheritance Biology

Mutagens cause lethal mutations, reducing the number of colonies.
Mutagens cause mutations that disrupt the ability of the cell to produce histidine.
Mutagens will cause an increase in the number of revertants.
Only mutagens that cause transitions can be identified.

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TLS Online TPP Program

#Question id: 7763

#Unit 5. Developmental Biology

Two major sources of mutation are radiation and reactive oxygen species (ROS).The reactive oxygen species hypothesis for aging postulates that

1) Senescence results from the accumulation of DNA, lipid, and protein damage inflicted by ROS of mitochondrial origin; and

2) Mitochondria of long-lived species should produce high ROS than do mitochondria of short-lived species.

3) the capacity of mitochondria to consume ROS might distinguish long-lived species from short-lived species, rather than differences in ROS generation.

TLS Online TPP Program

#Question id: 11168

#Unit 2. Cellular Organization

Which of the following membrane protein do not bind with lipid and, once purified, behave like water-soluble proteins?

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#Question id: 23754

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following is always found in 'Bravery'?

TLS Online TPP Program

#Question id: 14481

#Unit 13. Methods in Biology

A card is drawn from an ordinary pack of playing cards and a person bets that it is a spade or an ace. Then the odds against his winning this bet is

TLS Online TPP Program

#Question id: 4677

#Unit 3. Fundamental Processes

In bacteriophage lambda, PRM (promoter for repressor maintenance) transcribes only the