Which statement about PCR is FALSE?
A: PCR will amplify DNA, even from just a single DNA molecule.
B: Amplification of DNA in a PCR reaction is exponential.
C: PCR works on only a single strand of DNA at a time.
D: PCR uses primers to amplify both DNA strands simultaneously.
E: PCR requires DNA, primers, DNA polymerase, and nucleotides.
Ans: C: PCR works on only a single strand of DNA at a time.
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The energy to form the new bond when a nucleotide is added to a growing DNA strand is provided
primarily by ____.
a. unwinding of the DNA double helix b. hydrolysis of pyrophosphate c. breaking hydrogen bonds between base pairs d. DNA polymerase e. forming hydrogen bonds between base pairs
All mutations are not beneficial to the cell.
Answer the following statement true (T) or false (F)
Which of the following is true of monocots?
a. have two cotyledons b. leaf veins usually netlike c. pollen grains with three pores d. vascular bundles distributed throughout stem ground tissue e. floral parts in multiples of fours and fives
The movement of phosphorus and other non-gaseous chemicals takes place in which cycle?
a. global water cycle b. atmospheric cycles c. sedimentary cycles d. solar-plant cycle e. all of these