The correct answer is B. Hexapods
Explanation
Hexapods are insects belonging to a subclassification of arthropods, which have particular physical characteristics such as a body composed of three sections (head, thorax, and abdomen) and six legs, three on each side. Also, they are classified depending on their diet into three groups: chewers, choppers, and suck. finally, they are classified into terrestrial and flying groups. Flies have a body composed of three sections (head, thorax, and abdomen) and six legs, so flies are hexapods. So, the correct answer is B. Hexapods.
<h3><u>Answer;</u></h3>
b). Activation of an upstream guanine nucleotide exchange factor
<h3><u>Explanation</u>;</h3>
- <em><u>When a ligand activates the G protein-coupled receptor, it induces a conformational change in the receptor that allows the receptor to function as a guanine nucleotide exchange factor (GEF) that exchanges GDP for GTPthus turning the G protein-coupled receptor on.</u></em>
- The activated G-protein then dissociates into an alpha (G-alpha) and a beta-gamma complex.
But my guess its a oxygen? Or carbon dioxide?
Answer:
catabolite activator protein (CAP)
Explanation:
Catabolite activator protein (CAP) is a homodimeric transcriptional activator required for transcription initiation of catabolite-sensitive genes in <em>Escherichia coli</em>. CAP contains a ligand-binding domain at its N-terminus and a DNA-binding domain at its C-terminus. CAP activates transcription by binding at target DNA sites on promoter sequences, thereby enhancing the ability of the RNA polymerase to bind and initiate transcription. CAP binds cyclic AMP (cAMP) to increase CAP’s affinity to DNA and thus activates the transcription of genes for catabolism, such as the lactose (lac) operon genes (the lac operon is a set of genes that encode for enzymes taking part in lactose metabolism).