The backbone of a double helix is
A. sugar-phosphate.
B. hydrogen bonds.
C. base-pairing.
D. All of these answers are true.
A. sugar-phosphate.
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Before mRNA can be used in translation (the making of a new protein), nonfunctional segments of the gene that have been transcribed into the strand of pre-mRNA have to be "edited" out. The nonfunctional parts of the gene are cut out (and the functional parts spliced together) by a special type of enzyme. What are these enzymes called?
a) introns b) exons c) genomes d) snRNPs ("snurps") e) polyribosomes
The blind spot in the human retina is the location that has the collected axons of _____
A) ganglion cells B) bipolar cells C) primary visual cortex D) lateral geniculate nuclei
the penis is homologous to
What will be an ideal response?
The CRISPR-Cas9 system uses all except which of the following?
A) replacement DNA to be inserted at the cut site B) a guide RNA which locates the gene to be edited C) prokaryotic or eukaryotic cells to be edited D) an enzyme to cut both strands of DNA at the target site E) reverse transcriptase enzyme