The opening and closing of a plant's stomata are regulated by the flow of _____________ ions.
A. phosphorus
B. magnesium
C. copper
D. sulfur
E. potassium
Ans: E. potassium
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Each of the following molecules is an electron carrier in the electron transport system except
A) flavoproteins. B) iron-containing cytochromes. C) iron-sulfur proteins. D) coenzyme Q. E) All of the above are electron carriers.
The first cloned mammal, Dolly:a
was stillborn. b. developed arthritis and a virus-induced lung cancer at a relatively young age. c. lived a short period of time before suffering advanced aging effects. d. lived to a normal age for sheep. e. lived longer than normal sheep.
Two amino acids that are found in some proteins due to exceptions in the universal genetic code are ________.
A. lysine and cysteine B. lysine and selenocysteine C. pyrrolysine and cysteine D. pyrrolysine and selenocysteine
What are the functions of the products of min genes?
What will be an ideal response?