Why is ATP important in living organisms?
a. It is easily converted to starch for long-term storage.
b. It can transfer some of its energy to other chemicals.
c. It is an important structural component of cell membranes.
d. Like all other nucleic acids, it stores hereditary information.
e. Like RNA, it acts as a source code for the formation of proteins.
b
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The expression of a gene to form a polypeptide occurs in two major steps. What are these two steps in their correct chronological order?
a) transcription and then replication b) translation and then transcription c) transcription and then translation d) replication and then translation e) replication and then transcription
Which figure below represents meiosis I for an organism with a diploid number of 4?
A. A
B. B
C. C
D. D
A newly described unicellular organism was isolated from a salt mine. This organism has no membranous organelles and its cell wall lacks peptidoglycan. Attempts to culture it in a medium with less than 25% salt were unsuccessful, but it was able to grow well on 25% salt supplemented agar. This organism would best be described as a ________ and is most likely in the domain ________.
A. halophile; Archaea. B. thermophile; Bacteria. C. halophile; Bacteria. D. thermophile; Archaea. E. thermophile; Eukarya.
Which of these hormone-action pairs is mismatched?
A. Aldosterone-sodium reabsorption B. Oxytocin-suckling C. Atrial natriuretic peptide-muscle contraction D. Cortisol-glucose regulation E. Testosterone-secondary sex characteristics