The ________ portion of the cell membrane is responsible for the isolating function of the membrane, whereas the ________ portion regulates exchange and communication with the environment
A) nucleic acid; lipid
B) protein; cholesterol
C) lipid; protein
D) carbohydrate; lipid
E) cholesterol; lipid
C
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Which of the following best describes the translational elongation process?
A. tRNA molecules condense with rRNA molecules. B. Ribonucleotides are added to amino acids through the synthesis of phosphodiester bonds. C. The polypeptide chain is lengthened by synthesizing peptide bonds between amino acids. D. Ribosomal proteins aggregate to form polysomes.
Choose the most influential contributing factor to the reduced sense of smell in humans compared with the other great apes.
A. pseudogenes B. conservation of synteny C. aneuploidy D. one more chromosome in humans compared to the other great apes E. number of olfactory receptor (OR) genes present in the genome
Both the endocrine glands and neurons receive
signals from
a. the amygdala. b. the hypothalamus. c. the adrenal cortex. d. the anterior pituitary gland. e. more than one of these.
Four of the five processes listed below are related by
a common result. Select the exception. a. volcanic eruption b. photosynthesis c. respiration d. combustion e. decomposition