Practice Questions

TLS Online TPP Program

#Question id: 659

What does it mean to say a protein is oligomeric?

#Unit 1. Molecules and their Interaction Relevant to Biology

In vivo it establishes an equilibrium between two or more active conformations.
It has more than fifty amino acids.
The active protein involves the association of two or more polypeptide chains.
The protein has multiple α-helices.

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TLS Online TPP Program

#Question id: 24165

#General Aptitude

When winding an old clock, it is important not to overwind it. Overwinding occurs when the mainspring is almost fully wound, but the operator continues to turn the winding key. This causes the main spring to coil too tightly, and might even break it.

This paragraph best supports the statement that

TLS Online TPP Program

#Question id: 10882

#Unit 10. Ecological Principles

The difference between net and gross primary productivity would likely be greatest for

TLS Online TPP Program

#Question id: 16488

#Unit 12. Applied Biology

Advantages of organ culture are

TLS Online TPP Program

#Question id: 7309

#Unit 5. Developmental Biology

Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.

A. In Arabidopsis under short days, there is little overlap between CO mRNA expression and daylight.

B. CO protein does not accumulate to sufficient levels in the phloem to promote the expression of the transmissible floral stimulus and the plant remains vegetative.

C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.

D. CO activates FLC mRNA expression in the phloem, which causes flowering when the FT protein is translocated to the apical meristem.

Which of the following is incorrect?

TLS Online TPP Program

#Question id: 10147

#Unit 6. System Physiology – Plant

Which of the following enzymes is regulated by supramolecular assembly ?