During exercise, which organs receive an increase in the proportion of cardiac output delivered to them?
A) gastrointestinal tract and skeletal muscle
B) skeletal muscle, heart, and brain
C) skeletal muscle, heart, and skin
D) brain and heart
E) skeletal muscle, skin, and brain
Answer: C) skeletal muscle, heart, and skin
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When an F' plasmid acts as the donor in a mating, which of the following do(es) not happen?
A. The plasmid is transferred, including the chromosomal genes now on the plasmid. B. Some chromosomal genes not on the plasmid are transferred. C. The recipient becomes F'. D. All of the choices are correct.
Which of the statements best describes the mutational event pictured below?
Wild-type ACC CAC UCU GGA UUU AAG GCA thr his ser gly leu lys ala Mutant ACC CAC UCU UGA UUU AAG GCA thr his ser stop phe lys ala A. a transversion mutation leading to a nonsense codon B. a frameshift mutation leading to a missense amino acid substitution C. a transition mutation resulting in a silent amino acid substitution D. a transition mutation leading to a nonsense codon E. an insertion mutation resulting in a frameshift of the amino acid sequence
Scientists began to question the perfection of the
Chain of Being because of a. the discovery of new organisms in new parts of the world. b. the presence of body parts with no apparent function in some organisms. c. the existence of fossil forms. d. similarities in the structures found in different forms of life. e. all of these.
In chemiosmosis, ATP is produced as hydrogen ions (protons) pass through _____
a. ATP synthase b. ATP decarboxylase c. ATP dehydrogenase d. a series of electron carriers e. the outer mitochondrial membrane