Some viruses have a dsDNA genome. Others may have a ________ genome
A) ssDNA
B) dsRNA
C) ssRNA
D) ssRNA or dsRNA
E) ssDNA, ssRNA, or dsRNA
E
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During a stressful interval, _____
A) thyroid-stimulating hormaon (TSH) stimulates the adrenal cortex and medulla to secrete acetylcholine B) the alpha cells of islets secrete insulin and simultaneously the beta cells of the islets secrete glucagon C) adrenocorticotropic hormone (ACTH) stimulates the adrenal cortex, and neurons of the sympathetic nervous system stimulate the adrenal medulla D) the posterior pituitary gland secretes more growth hormones E) the calcium levels in the blood are increased due to actions of two antagonistic hormones, epinephrine and norepinephrine
Which of the following is an important consequence of the evolution of diatoms and coccolithophorids?
A. They dominated photosynthesis in the oceans. B. The silica and calcium carbonate contained in these organisms became a primary source of carbonate sediments on the seafloor. C. They produced respective "blooms" in the ocean. D. They led to the extinction of cyanobacteria. E. None of these answer options is correct.
Nuclear pores function as gateways for molecules to enter and exit a nucleus. Protein synthesis offers an example of why this movement is important. Explain
What will be an ideal response?
The three main products of glycolysis are:
A) ATP, pyruvic acid, and CO2. B) ATP. NADH, and pyruvic acid. C) ATP, NADH, and CO2. D) NAD+, pyruvic acid, and CO2. E) ATP, NAD+, and CO2.