If an amine group added to a precursor comes from a preexisting amino acid, the process is called
a) beta-oxidation.
b) amination.
c) transamination.
d) beta-reduction.
Answer: c) transamination.
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You are a doctor examining a patient whose thymus never developed because of a medical condition called DiGeorge syndrome. You know that this medical condition is usually due to the deletion of a section of chromosome #22
The karyotype of this patient shows one copy of chromosome #22 that is of normal length and one copy that is shortened. This indicates that the genotype of this patient is _______________ and that the expression of this trait is _____________. A. Homozygous dominant; dominant B. Heterozygous; dominant C. Heterozygous; recessive D. Homozygous recessive; recessive
The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is
A. host cell synthesis of viral enzymes and capsid proteins. B. assembly of nucleocapsids. C. replication of viral nucleic acid. D. injection of only the viral nucleic acid into the host cell. E. adsorption to the host cells.
There are three tRNAs with anticodons complementary to stop codons Indicate whether the statement is true or false
The steps involved in a single PCR cycle, in the correct order, are
A. heat to denature DNA strands and for primer to anneal, cool to allow DNA polymerase to copy DNA. B. heat to denature DNA strands, cool to allow primer to anneal, heat slightly to allow DNA polymerase to copy DNA. C. cool to denature DNA strands, heat to allow primer to anneal, cool to allow DNA polymerase to copy DNA. D. cool to allow DNA strands to anneal, heat to allow primer to anneal, cool to allow DNA polymerase to copy DNA. E. cool to allow primer to anneal, heat to denature DNA strands, cool to allow DNA polymerase to copy DNA.