Mitochondria ________.
A) are single-membrane structures involved in the breakdown of ATP
B) synthesize proteins for use outside the cell
C) contain digestive enzymes called acid hydrolyses
D) contain some of the DNA and RNA code necessary for their own function
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Question 2) Which of the following is NOT a function of the smooth endoplasmic reticulum?
A) breakdown of stored glycogen to form free glucose
B) steroid-based hormone synthesis
C) protein synthesis in conjunction with ribosomes
D) lipid metabolism and cholesterol synthesis
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Question 3) Which transport process is the main mechanism for the movement of most macromolecules by body cells?
A) secondary active transport
B) receptor-mediated endocytosis
C) pinocytosis
D) phagocytosis
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Question 4) The functions of centrioles include ________.
A) producing ATP
B) serving as the site for ribosomal RNA synthesis
C) providing a whiplike beating motion to move substances along cell surfaces
D) organizing the mitotic spindle in cell division
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Question 5) Some hormones enter cells via ________.
A) exocytosis
B) receptor-mediated endocytosis
C) primary active transport
D) pinocytosis
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Question 6) A gene can best be defined as ________.
A) a segment of DNA that carries the instructions for one polypeptide chain
B) a three-base triplet that specifies a particular amino acid
C) noncoding segments of DNA up to 100,000 nucleotides long
D) an RNA messenger that codes for a particular polypeptide
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Question 7) If a tRNA had an AGC anticodon, it could attach to a(n) ________ mRNA codon.
A) UCG
B) TCG
C) UGA
D) AUG
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Question 8) The cruciate ligaments of the knee ________.
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Question 9) Which of the following does NOT describe enzymes?
A) Enzymes work by raising the energy of activation.
B) Some enzymes are purely protein.
C) Some enzymes are protein plus a cofactor.
D) Each enzyme is chemically specific.
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Question 10) ATP ADP + Pi is an example of a(n) ________ reaction.
A) decomposition
B) exchange
C) synthesis
D) reversible
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