Which statement is false?
a. Chaperones are involved in folding proteins, assembling multiprotein complexes, and incorporating cofactors into enzymes.
b. The Sec system processes unfolded proteins, and proteins that are already folded are translocated by the Tat system.
c. Gram-positive bacteria have more complicated secretion systems than gram-negatives.
d. Protein secretion systems are targets for vaccine development.
Answer: C
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Graded potentials are particularly important for conveying stimulus intensity in
A. sensory neurons. B. motor neurons. C. interneurons. D. skeletal muscle cells. E. Schwann cells.
Which statement correctly describes the inheritance of sex chromosomes?
a. A woman will pass on a specific X chromosome to all of her daughters. b. A woman will pass on an X chromosome to half of her children. c. A woman will pass on an X chromosome to all of her children. d. A woman’s genetic contribution determines the sex of her children. e. A man will pass on an X chromosome to all of his children.
What is the difference between a totipotent stem cell and a pluripotent stem cell? What piece of evidence would you
need to distinguish them? What will be an ideal response?
Electrons excited in photosystem II help the chloroplast produce
A. water. B. NADPH. C. glucose. D. NADH. E. ATP.