The tertiary structure of a polypeptide refers to
A) its size.
B) the presence of pleated sheets.
C) the amino acids of which it is made.
D) the overall three-dimensional structure.
Answer: D
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Assuming geological evidence is accurate, life on Earth may have originated
a. 14 billion years ago. b. 4.6 billion years ago. c. 3.5 billion years ago. d. 2.1 billion years ago. e. 1.2 billion years ago.
The posterior pituitary secretions produce their effects
a. on the gonads. b. in the thyroid glands. c. on adrenal glands. d. on mammary glands. e. on thirst mechanism.
In general, mothers typically make a larger parental investment in each offspring than males do. What is meant by the term parental investment?
What will be an ideal response?
The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s22s22p6. What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?
A. 1s22s22p63s23p6 B. 1s22s62p23s63p2 C. 1s22s83p8 D. 1s22s23p64s25p6