What causes antigenic variation?
A. gene mutation
B. differential gene expression
C. genetic rearrangement
D. All of the answer options are correct.
B
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Which of the following statements DOES NOT support the hypothesis that neoteny contributed to the evolution of modern humans from our common ancestor with chimpanzees?
A. Juvenile Great Apes have large heads (relative to body size) and are less hairy than adult Great Apes. B. Neoteny involves changes in the developmental timing of gene regulation, consistent with the observation that the genome sequence of human and chimp are 99% identical. C. It has been suggested that the human mentality, characterized by questioning and playfulness, are characteristics of juvenile Great Apes. D. Sexual maturity occurs earlier in Great Apes than in humans.
In sequencing by synthesis (SBS) methods, the sequence of a sample is directly determined as nucleotides are incorporated into a DNA strand by DNA polymerase
Indicate whether the statement is true or false
What important resource do Schwann cells and oligodendrocytes provide to neurons?
A. oxygen B. nutrients C. physical strength from microtubules D. Ca2+ currents E. insulating layers of membrane
Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell does not
have a signal peptide. Which of the following would you associate with the location of translation to form that polypeptide?
a. cytoplasm only b. first cytoplasm, then rough ER c. Golgi apparatus only d. first rough ER, then Golgi apparatus e. rough ER only