Practice Questions

TLS Online TPP Program

#Question id: 9217

Which of the following conditions is the most likely indicator of a population in an extinction vortex?

#Unit 9. Diversity of Life Forms

The species in question is found only in small, stable pockets of its former range.
The effective population size of the species falls below 1,000.
Genetic measurements indicate a loss of genetic variation over time.
The population is permanently small.

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TLS Online TPP Program

#Question id: 33526

#Unit 2. Cellular Organization

The number of protein-coding genes is less than the number of potential polypeptides that can result in several polypeptides from the same gene because of mechanisms

A. alternative splicing

B. alternate promoter selection,

C. alternate poly(A) site selection

D. Number of Introns in the gene

TLS Online TPP Program

#Question id: 33527

#Unit 2. Cellular Organization

Match the following

TLS Online TPP Program

#Question id: 33528

#Unit 2. Cellular Organization

The Y chromosome has

TLS Online TPP Program

#Question id: 33529

#Unit 2. Cellular Organization

A. X and Y chromosomes have descended from a common, very ancient autosome pair.

B. X and Y chromosomes have descended from different autosome.

C. During evolution, the X chromosome has retained most of the original genes, whereas the Y chromosome has lost most of them.

D. During evolution, the X chromosome has lost most of them, whereas the Y chromosome has retained most of the original genes.

Which of the following is correct combination

TLS Online TPP Program

#Question id: 33530

#Unit 2. Cellular Organization

One approach to determine the number of essential genes

A. Mutational Analysis

B. Sequence Alignments

C. Complementation

D. Mass Spectroscopy

TLS Online TPP Program

#Question id: 33531

#Unit 2. Cellular Organization

The data obtained during DNA microarray analysis showing wildtype vs. mutant expression of genes under different conditions, represented as