bio exam 2 practice test questions

How many CO2 molecules are needed for a plant to make one sucrose molecule?

12

How many CO2 molecules are real eased by a SINGLE pyruvate molecule during aerobic respiration?

3

a diagram of a metabolic pathway shows metabolite A which is converted to metabolite D with metabolites A and B. As D builds up in the cell it inhibits enzyme 1. What happens to the amounts of A and B

A will increase and B will decrease

cellulose does not readily react with O2 forming CO2 and H2O at room temperature because

At room temperature the activation energy barrier for this reaction cannot be surmounted

In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which of the following facts?

DNA does not contain sulfur, whereas protein does DNA contains phosphorus, but protein does not

Which molecule will yield the most energy in aerobic respiration?

Glucose

Which molecule brow is the most oxidized?

N=N the molecule with the lease # of H+ or none at all

At this moment, which runner is probably using glucose at the fastest rate? a) Runner A has depleted his blood glucose and his muscles are well oxygenated b) Runner B has depleted his blood glucose and his muscles are anaerobic c) Runner C has normal blood glucose levels and his muscles are well oxygenated d) Runner D has normal blood glucose levels and his muscles are anaerobic

Runner D

which organism below is capable of aerobic respiration? a. grass b. yeast cells c. oak trees d. mice. e. all of these organisms are capable of aerobic respiration

e

Which part of aerobic respiration is inhibited by the carbon monoxide?

electron transport

you accidentally leave your favorite house/dorm plant in the dark over thanksgiving vacation. to your surprise it is still alive when you return because _________

it obtained energy from stored sugar and starch molecules produced before your vacation

in his transformation experiments, Griffith observed that

mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form

In the reaction: pyruvate + NAD+ --> acetyl-CoA + CO2 + NADH + H+, which of the reactants has been oxidized?

pyruvate has been oxidized