Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6331
TLS Online TPP Program

#Question id: 8717

Molecular clocks are more reliable when ________.

#Unit 9. Diversity of Life Forms
  1. the surrounding pH is close to 7.0
  2. most mutations of highly conserved DNA sequences should have no functional effect
  3. the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
  4. a significant proportion of mutations are not acted upon by natural selection
More Questions
TLS Online TPP Program

#Question id: 28778

#Unit 2. Cellular Organization

In the nucleation phase the  G-actin molecules binds to form a trimer, which makes__
a) the entire group relatively weakly to each other
b) the entire group more stable
c) the group acts as a nucleus for polymerization
d) the clump act as a secondary structure
Which of the following statements is correct?
TLS Online TPP Program

#Question id: 11313

#Unit 1. Molecules and their Interaction Relevant to Biology

Monosaccharides occur predominantly as cyclic (ring) structures in which the carbonyl group of aldehyde sugar has formed a covalent bond with the oxygen of a hydroxyl group along the chain. The reaction involved in formation of these ring structure called
TLS Online TPP Program

#Question id: 13033

#Unit 13. Methods in Biology

The sample is then fractionated by electrophoresis through a _______. As all the proteins now have an _______ to mass ratio, they are separated on the basis of their _____.
TLS Online TPP Program

#Question id: 29450

#Unit 6. System Physiology – Plant

Ammonium uptake from the soil is carried out by
TLS Online TPP Program

#Question id: 28681

#Unit 2. Cellular Organization

CENP-A is a variant of which one of the following histones?