Excessive collagen formation often results in a hard, raised scar called a ______.
Fill in the blank(s) with the appropriate word(s).
keloid
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Diatoms require silicon due to their
A) Ca2+/Si4+ symporters. B) DNA replication mechanism. C) ornate frustules. D) unique phototrophic physiology.
If a stretch of human double stranded DNA contains 47% G and C bases, then ____
a. it contains 47% A and T bases b. there are more pyrimidines than purines c. there are more purines than pyrimidines d. it contains 53% A and T bases
e. there are no genes in this stretch of DNAWhich light rays ideas for photosynthesis?
A) Light having long wave lengths B) Light having short wave lengths C) Violet blue indigo light D) Ultraviolet light E) B & C are correct
A mutated version of a virus that cannot disable the p53 gene can be used to
a. kill cancer cells. b. repair defective genes. c. turn off signal cascades. d. turn off the host cell’s enzymatic activities.