Within a single cell, which of the following is physically the smallest?

A. Nuclear envelope
B. Phospholipid molecule
C. Cell membrane
D. Mitochondrion


Ans: B. Phospholipid molecule

Biology & Microbiology

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Which gland is associated with daily

biorhythms? a. pineal b. parathyroid c. thymus d. pituitary e. thymus

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Stomach acid does not break down the wall of the stomach because gastric juice contains a powerful base that neutralizes the acid before it can cause damage

Indicate whether the statement is true or false

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Which of these joints allow movement in only one plane, such as in the knee or elbow?

A) hinge B) ball-and-socket C) fibrous D) cartilaginous

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You have a concentrated stock solution of 10 M NaOH and want to use it to produce a 150 mL solution of 3 M NaOH. What volume of water and stock solutions will you measure out to make this new solution?

(a) 135 mL of water, 15 mL of NaOH stock (b) 115 mL of water, 35 mL of NaOH stock (c) 100 mL of water, 50 mL of NaOH stock (d) 105 mL of water, 45 mL of NaOH stock

Biology & Microbiology