The first enzymes were probably:a
protein reproducing enzymes.
b. RNA degrading enzymes.
c. DNA synthesis enzymes.
d. ribozymes.
e. RNA synthesis enzymes
D
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What type of mutation results in sickle cell
anemia?
a. base- pair substitution b. insertion c. deletion d. frame-shift e. gene duplication
What would happen developmentally if a zygote with XY sex chromosome karyotype had a defective testosterone receptor?
What will be an ideal response?
Digestion in a sponge takes place in:
A. the osculum. B. individual cells. C. the spongocoel. D. the spicule. E. the mesophyll.
Which one of the following provides the central nervous system with information about the outside environment?
A) motor division B) sympathetic division C) parasympathetic division D) sensory division E) autonomic division