The codon 5'-AAA-3' codes for the amino acid lysine. Which of the following mutations in this codon is a neutral mutation?
A) 5'-ATA-3' to isoleucine
B) 5'-AGA-3' to arginine
C) 5'-AAG-3' to lysine
D) 5'-CAA-3' to glutamine
E) 5'-AAC-3' to asparagine
B
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The pigment ____ is commonly found in bacteria but not land plants
a. chlorophyll a b. chlorophyll b c. xanthophyll d. phycocyanin e. carotene.
Based on this DNA fingerprint, who is guilty of the sexual assault?
1.Suspect 1
2.Suspect 2
3.Neither of the two tested suspects committed the crime.
4.Neither of the suspects can be excluded.
All of the following are characteristics of life EXCEPT
A. evolution. B. reproduction. C. homeostasis. D. multicellularity.
Phillip is breathing at approximately 40 ventilations per minute. What is the respiratory center indicating?
Select one: a. low oxygen concentration in the lungs b. high carbon dioxide concentration in the blood c. low oxygen concentration in the blood d. the firing of the intercostal nerves e. stretch receptors in the alveolar walls