Which of the following protects bacteria from lysis in dilute solutions and helps to determine their cellular morphology or shape?
A. Capsule
B. Peptidoglycan
C. Gas vacuoles
D. Plasma membrane
Answer: B
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The main form(s) of nitrogen taken up by plant roots and useful to plants is/are:
A. N-N. B. nitrite. C. nitrite and nitrate. D. ammonia and N-N. E. nitrate and ammonia.
Where are the protein complexes associated with the electron transport chain located?
A. mitochondrial membrane B. mitochondrial matrix C. mitochondrial intermembrane space D. mitochondrial inner membrane E. cytosol
When considered as a root cause for cancer, which of the following is linked to at least 17 types of human cancer?
A) eating a high-fat diet B) not exercising regularly C) eating a low-fat diet D) smoking
The genetic code:
A) is a list of all the possible proteins that can be made. B) shows the connection between nucleotide triplets and the amino acids they code for. C) tells us how RNA is assembled on a DNA template. D) shows the connection between nucleotide triplets in DNA and their corresponding codons in RNA. E) describes the mechanics of translation.