Which one of the following is true of your mRNA?
A. The mature mRNA is produced directly from DNA.
B. A pre-mRNA is produced directly from DNA, and then a mature mRNA is created by the removal of introns.
C. A pre-mRNA is produced directly from DNA and then a mature mRNA is created by the removal of exons.
D. DNA is produced directly from mRNA.
B. A pre-mRNA is produced directly from DNA, and then a mature mRNA is created by the removal of introns.
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Secondary messengers are molecules that bind with signal receptors on the plasma membrane of a target cell
1.True 2.False
Fertilization begins when ____
a. sperm enter the uterus b. sperm enters the secondary oocyte c. prior to sperm capacitation d. before the sperm pass through the zona pellucida e. the egg nucleus produces 46 chromosomes
List the 7 major groups of microbes
What will be an ideal response?
Methylation and acetylation are common changes made to histone H3, and the specific combination of these changes is sometimes referred to as the "histone code." Which of the following patterns will probably lead to gene silencing?
(a) lysine 9 methylation (b) lysine 4 methylation and lysine 9 acetylation (c) lysine 14 acetylation (d) lysine 9 acetylation and lysine 14 acetylation