An essential nutrient __________
a. is produced in high quantities in the body
b. is produced in small quantities in the body
c. must be obtained through the diet
d. is a rich source of minerals
C
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Occasionally, chromosomes fail to separate during meiosis, leading to daughter cells that have an abnormal number of chromosomes. This phenomenon is called
A. epistasis. B. nondisjunction. C. crossing over. D. pleiotropy. E. chromosome inactivation.
Which of the following is an example of a phenotype?
a. a cat’s genome b. the color and length of a cat’s fur c. the alleles that a female passes on to her offspring d. the DNA sequence of an allele e. the DNA sequence of an allele and the alleles that a female passes on to her offspring
Which of the following is a milestone prokaryotic transcription initiation?
a. polymerase synthesizing mRNA in the 5’ to 3’ direction b. formation of a stable hairpin c. opening of the transcription bubble d. polymerase stalling in a region that is rich in A-T nucleotides
Each amino acid is encoded by only one mRNA codon
a. True b. False