You start to fall but then catch yourself, regaining your balance. Which of the following brain regions is responsible for the rapid coordination of muscle activity that kept you from falling?
A) motor cortex
B) thalamus
C) cerebellum
D) pons
Answer: C
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Coenzymes are derivatives of
A. minerals. B. proteins. C. lipids. D. vitamins.
Posttranslational modification includes ____
a. cleavage of poly-A tails from mRNA b. the binding of miRNAs to mRNA c. the chemical modification, processing, and degradation of proteins d. chromatin remodeling e. splicing of mRNAs
Each of two daughter cells that result from the normal mitotic division of the original parent cell
contains ____.
a. the same number of chromosomes but different genes than the parent cell b. the same number of chromosomes and genes identical to those of the parent cell c. half the number of chromosomes but different genes than those of the parent cell d. half of the number of chromosomes and genes identical to those of the parent cell e. twice the number of chromosomes and genes identical to those of the parent cell
Why is it necessary for the testes to be in the scrotum to function properly?
A) The scrotum keeps the testes at a cool temperature necessary for sperm production. B) The sperm are produced in the scrotal tissue and transferred to the testes to finish maturation. C) The scrotum contains alkaline fluids to nourish the sperm. D) The testes develop from scrotal tissues. E) The scrotum elevates the temperature of the testes, which increases sperm production.