Practice Questions

TLS Online TPP Program

#Question id: 2227

Which of the following statements is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal?

#Unit 2. Cellular Organization

Sodium and glucose compete for the same binding site in the cotransporter.
Glucose entering the cell down its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient.
Sodium ions can move down their electrochemical gradient through the cotransporter whether glucose is present outside the cell.
A substance that blocks sodium ions from binding to the cotransport protein will also block the transport of glucose.

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TLS Online TPP Program

#Question id: 14862

#Unit 6. System Physiology – Plant

Nitrate transport is an example that is of interest not only because of its nutritional importance, nitrate is negatively charged, and such an electric charge imposes an energy requirement for the transport, Mutants in nitrate transport or nitrate reduction can be selected by growth in the presence of chlorate, Chlorate is;

TLS Online TPP Program

#Question id: 7126

#Unit 5. Developmental Biology

What is the role of stem cells with regard to the function of adult tissues and organs?

TLS Online TPP Program

#Question id: 12920

#Unit 13. Methods in Biology

The development of isothermal systems such as the ____ DNA amplification system do away with the need for a thermal cycler and have the advantage of being able to be used outside the laboratory.

TLS Online TPP Program

#Question id: 678

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is not true about β-sheets?

TLS Online TPP Program

#Question id: 19451

#Unit 13. Methods in Biology

We use different lenses in combinations. The total magnification is represented as