The specific linear sequence of amino acids that form a polypeptide chain is
A) quarternary structure
B) tertiary structure
C) secondary structure
D) DNA sequence
E) primary structure
Ans: A) quarternary structure
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The genetic material of all living organisms is ____
a. protein b. deoxyribonucleic acid c. ribonucleic acid d. glycoprotein e. polypeptide
Hemophilia is caused by an X-linked recessive mutation in humans. If a woman whose paternal uncle (father's brother) was a hemophiliac marries a man whose brother is also a hemophiliac, what is the probability that their first child will have hemophilia? (Assume that no other cases of hemophilia and no hidden carriers exist in the pedigree.)
A) 0 B) 1/4 C) 1/2 D) 1/8 E) 1
The nicking of DNA that initiates recombination during mitosis may be due to all of the following EXCEPT
A) instructions from the normal cell cycle program. B) X-rays. C) chemical damage. D) physical damage. E) radiation.
What is the proper sequence in the flow of air in mammals?
a. nasal cavities, larynx, pharynx, bronchi, trachea b. nasal cavities, pharynx, bronchi, larynx, trachea c. nasal cavities, pharynx, larynx, trachea, bronchi d. nasal cavities, larynx, pharynx, trachea, bronchi e. nasal cavities, bronchi, larynx, trachea, pharynx