Which particle is able to freely cross the plasma membrane?
a. Na+
b. Clc.
oxygen
d. glucose
e. amino acids
ANSWER: c
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An herbivore is indicated by
a. A. b. B. c. C. d. D. e. E.
A region of a chromosome on spanning the centromere is broken and reattached in the reverse direction. This is an example of which type of chromosomal defect?
A) paracentric inversion B) pericentric inversion C) pericentric translocation D) dicentric inversion E) dicentric translocation
How can you explain the fact that protein synthesis proceeds normally in mammals in which not all mitochondrial tRNAs are encoded in mitochondrial DNA?
What will be an ideal response?
DNA polymerase, before any proofreading by repair enzymes, makes one mistake for about every
A) 10,000 to 1 million base pairs. B) 100 million to 10 billion base pairs. C) 1 million to 10 million base pairs. D) 1 to 100 base pairs. E) 100 to 1,000 base pairs.