Briefly explain the relationship between the surface area and volume of a cell and overall cell size. List
two ways in which organisms have successfully "solved" this problem.What will be an ideal response?
The surface area of a cell must be large enough to support the metabolism of the cell volume.
To solve this problem some cells have long flat extensions and others have fingerlike projections to
increase surface area
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Which of the following is in the correct order for one cycle of polymerase chain reaction (PCR)?
A) Denature DNA; add fresh enzyme; anneal primers; add dNTPs; extend primers. B) Add fresh enzyme; denature DNA; anneal primers; add dNTPs; extend primers. C) Anneal primers; denature DNA; extend primers. D) Extend primers; anneal primers; denature DNA. E) Denature DNA; anneal primers; extend primers.
Phosphofructokinase is an allosteric enzyme in the glycolysis pathway. Regulation of glycolysis is directly related to the level of ATP and citrate. If ATP or citrate levels are high, phosphofructokinase will be inhibited
What will happen to this enzyme when ATP levels drop? A. Phosphofructokinase will be inhibited. B. Phosphofructokinase will be activated. C. Metabolism of citrate will be inhibited. D. Metabolism of phospholipids will be activated. E. Metabolism of phospholipids will be inhibited.
Mutations in an exon region of a gene are most likely to _____
a. prevent mRNA from being synthesized b. trap mRNA inside the nucleus c. prevent mRNA from being recognized by the ribosome d. prevent mRNA from being post-transcriptionally modified e. alter the amino acid sequence
Only one mode of exercise is recommended for cardiorespiratory fitness.
a. true b. false