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TLS Online TPP Program

#Question id: 2900

Which of the following statement is INCORRECT from the set of statements given below?

#Unit 2. Cellular Organization

  1. Since deamination is a common cause of DNA damage, and since the deamination of cytosine forms a product similar in structure to uracil, repair enzymes cannot repair this damage easily.

  2. In packaging the eukaryotic DNA into nucleosomes, it is thought that the requirement for histone proteins and their synthesis is a cause of the slower rate of movement of the replication fork.

  3. In photoreactivation, DNA damage caused by UV light is reversed by DNA photolyase which forms a complex with thymine dimers which absorbs visible light and reverses the dimerization.

  4. DNA is the only cell macromolecule that can be repaired.

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TLS Online TPP Program

#Question id: 12468

#Unit 10. Ecological Principles

If the sex ratio in a population is significantly different from 50:50, then which of the following will always be true? 
TLS Online TPP Program

#Question id: 12469

#Unit 10. Ecological Principles

A population of strictly monogamous swans consists of 40 males and 10 females. What is the effective population size (ne) for this population?
TLS Online TPP Program

#Question id: 12470

#Unit 10. Ecological Principles

An ecologist recorded 12 white-tailed deer, Odocoileus virginianus, per square mile in one woodlot and 20 per square mile on another woodlot. What was the ecologist comparing?
TLS Online TPP Program

#Question id: 12471

#Unit 10. Ecological Principles

To measure the population density of monarch butterflies occupying a particular park, 100 butterflies are captured, marked with a small dot on a wing, and then released. The next day, another 100 butterflies are captured, including the recapture of 20 marked butterflies. One would estimate the population to be
TLS Online TPP Program

#Question id: 12472

#Unit 10. Ecological Principles

During the spring, you are studying the mice that live  in  a  field  near your home. There are lots  of  mice in  this field, but you realize that you rarely observe any reproductive females. This most likely indicates
TLS Online TPP Program

#Question id: 12473

#Unit 10. Ecological Principles

You are observing a population of lizards when you notice that the number of adults has increased and is higher than previously observed. One explanation for such an observation would include