Answer:
Hox genes regulate sex determination in mammals.
-Hox genes regulate flower development.
-Hox genes encode transcription factors that respond to steroids.
-Hox genes encode transcription factors with a DNA-binding domain called a homeo box and regulate development of the vertebrate body plan
- Hox genes are transcription factors that bind to specific DNA sequels called homeodomains
and regulate development of the vertebrate body plan.
Hox genes are transcription factors that bind to specific DNA sequences called
homeodomains.
Explanation:
The answer is B) stop condons.
Stop codons, UGA, UAA, and UAG, are nucleotide triplets that signal to stop the translation of an mRNA sequence into proteins.
Answer:Recall that the glycolytic pathway generates NADH in the cytosol in the oxidation of glyceraldehyde 3-phosphate, and NAD+ must be regenerated for glycolysis to continue. How is cytosolic NADH reoxidized under aerobic conditions? NADH cannot simply pass into mitochondria for oxidation by the respiratory chain, because the inner mitochondrial membrane is impermeable to NADH and NAD+. The solution is that electrons from NADH, rather than NADH itself, are carried across the mitochondrial membrane. One of several means of introducing electrons from NADH into the electron transport chain is the glycerol 3-phosphate shuttle (Figure 18.37). The first step in this shuttle is the transfer of a pair of electrons from NADH to dihydroxyacetone phosphate, a glycolytic intermediate, to form glycerol 3-phosphate.This reaction is catalyzed by a glycerol 3-phosphate dehydrogenase in the cytosol. Glycerol 3-phosphate is reoxidized to dihydroxyacetone phosphate on the outer surface of the inner mitochondrial membrane by a membrane-bound isozyme of glycerol 3-phosphate dehydrogenase. An electron pair from glycerol 3-phosphate is transferred to a FAD prosthetic group in this enzyme to form FADH2. This reaction also regenerates dihydroxyacetone phosphate.
Explanation:
Melanin...this is why the blacks can't get sunburnt easily.
