Both DNA and RNA polymerases must be able to copy from a template strand with great accuracy. Still, either one can make mistakes that could lead to a mutation. For which one of these polymerases would a mistake be the most serious in the long term?
Explain your answer.
What will be an ideal response?
RNA polymerase makes mRNA, a molecule used in translation for a short period of time before it is broken down. DNA is the permanent record of a gene, so errors made by DNA polymerase are permanent.
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Frequently a critical component in the medium, often the carbon source, is added ________ so that the microorganisms will not have excess substrate available at any given time.
A. sporadically B. gradually C. continuously D. None of these choices are correct.
If an individual has 10 gene pairs, how many different gametes can be formed if three of the gene pairs are homozygous and the remaining seven gene pairs are heterozygous?
A) 49 B) 100 C) 128 D) 1024 E) 131,072
Erythropoietin
a. is the most common blood protein. b. is secreted by the liver. c. stimulates the red bone marrow to generate red blood cells. d. is an enzyme that functions in blood clotting. e. increases the ability of plasma to transport carbon dioxide.
A structure consisting of two homologous chromosomes bound together so tightly during the first meiotic prophase that they behave as a single unit is called a ________
Fill in the blank with correct word.