What factor has the strongest influence on the cleavage pattern of an embryo?
A. Maturity of cytoplasm
B. Oxygen in air
C. Amount of yolk
D. Viscosity of albumin
Answer: C
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An experimenter has altered the end of the tRNA corresponding to the amino acid methionine in such a way as to remove the bases AC. Which of the following hypotheses describes the most likely result?
A) tRNA will not form a cloverleaf. B) The amino acid methionine will not become covalently bound. C) The anticodon will not bind with the mRNA codon. D) The aminoacyl-tRNA synthetase will not be formed.
Which of these lines represents the pattern of change in mass over that time?
A) A B) B C) C
Group B Streptococcus is most likely to cause bacterial meningitis in which of the following age groups?
A) older adults B) newborns C) infants and children D) adolescents and young adults E) It infects all age groups equally.
Erythema infectiosum is a dangerous but treatable disease.
Answer the following statement true (T) or false (F)