Describe three reagents used and the three steps in the process of polymerase chain reaction
What will be an ideal response?
The reaction calls for Taq polymerase, a pool of nucleotides, primers, and a thermo
cycler. The three steps in the process are as follows: denaturation, which occurs at 94ºC to
separate the DNA strand; annealing, in which the temperature varies depending on the primers
but is usually between 50ºC and 60ºC and allows the primers to adhere to the DNA strands; and
extension, which occurs at 72ºC, allowing for elongation of the DNA from the primer.
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If a plant cell is stripped of its cell wall it forms a protoplast. A protoplast would _____
A. be connected to adjacent protoplasts by a middle lamella. B. be surrounded by cellulose. C. be less rigid than a plant cell. D. be stronger than a plant cell.
Growth of yeasts and molds will be favored in more acidic foods.
Answer the following statement true (T) or false (F)
The final electron acceptor during the process of oxidative phosphorylation is which of the following?
a. carbon dioxide b. water c. oxygen d. glucose
A wild duck needs a steady supply of energy to be able to fly for hours. Domesticated chickens rarely fly. As a result, you would expect to find in the breast muscles of wild ducks than in domesticated chickens.
A. less cytoplasm B. more Golgi apparatus C. fewer mitochondria D. more mitochondria E. more cytoplasm