Which of the following is true for actin?
A. Portions of the actin molecule bend and move along myosin molecules.
B. Actin binds to myosin.
C. Actin uses up calcium ions.
D. Actin conducts the nerve impulse to the muscle cell.
B. Actin binds to myosin.
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You discover a new multicellular organism. The organism has organelles and cell walls composed mainly of cellulose. This new organism could be
A. a plant. B. a bacterium. C. an animal. D. a fungus. E. an archaea.
The following mRNA transcript would result in which polypeptide sequence?
5?-ACU UUC ACU AUG UUU UUA UCC UCC ACU CCU UGA-3? Use the following codons and the amino acids they encode. AUG = Start or Met; UUU, UUC = Phe; UUA, UUG = Leu; UCU, UCC = Ser; CCU, CCC = Pro; ACU, ACC = Thr; UGA = Stop. A. Thr-Phe-Thr B. Phe-Leu-Ser-Ser-Thr-Pro C. Met-Phe-Leu-Ser-Ser-Thr-Pro D. Thr-Phe-Thr-Phe-Leu-Ser-Ser-Thr-Pro E. Met-Phe-Leu-Ser-Ser
The joint between vertebrae is an example of a ____ joint
a. cartilaginous b. synovial c. fibrous d. spongy e. intervertebral
Set-point theories of hunger and eating are deficient because they fail to recognize the major influences on hunger and eating of such important factors as:
(a) taste (b) learning (c) social influences (d) all of the above