Which of the following statements is not true of the amino acids?
A) There are more than 60 different kinds of amino acids present in cells.
B) The R group of amino acids differs from one amino acid to another.
C) Only around 20 amino acids are used in protein synthesis.
D) All amino acids exist in two stereoisomeric forms.
E) Amino acids have an N-terminus, C-terminus, and R groups.
D) All amino acids exist in two stereoisomeric forms.
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The temperature at which an alligator's egg is incubated will determine the sex of the offspring. The dependent and the independent variables in this experiment are ________.
Fill in the blank(s) with the appropriate word(s).
Identify the stage of mitosis in photo C
a. interphase b. prophase c. metaphase d. anaphase e. telophase
What do shipworms and a peanut worms have in common?
a. both can bore through hard substrata. b. both are filter feeders. c. both are in the same phylum. d. both are hermaprodites.
________ will take calcium from the blood, whereas ________ will deposit calcium into the blood.
A. Osteocytes; osteoblasts B. Osteoblasts, osteocytes C. Osteoblasts; osteoclasts D. Osteoclasts; osteoblasts E. Osteocytes; osteoclasts