1- Which of the following statements about the differences between DNA and RNA i
ID: 88160 • Letter: 1
Question
1- Which of the following statements about the differences between DNA and RNA is/are accurate?
a. DNA encodes hereditary information, whereas RNA does not.
b. DNA forms a double-stranded helix, whereas RNA is typically a single-stranded molecule.
c. DNA contains the base uracil, whereas RNA contains the base thymine.
d. DNA contains four different kinds of nucleotides, whereas RNA contains three different kinds of nucleotides.
e. All of the above statements are accurate
2- The secondary structure of a protein is the:
a. bonding together of several polypeptide chains by weak bonds.
b. order in which amino acids are joined in a polypeptide chain.
c. unique three-dimensional shape of the fully folded polypeptide.
d. organization of a polypeptide chain into an helix or pleated sheet.
e. overall protein structure resulting from the aggregation of two or more polypeptide subunits.
3- Which term most precisely describes the addition of water during a reaction to break apart two monomers in a polymer?
a. catalysis
b. hydrolysis
c. anabolism
d. condensation
e. catabolism
4- The use of a carrier protein to speed the movement of molecules across the plasma membrane from an area of high to low concentration of the molecules is an example of:
a. passive transport.
b. facilitated diffusion.
c. active transport.
d. osmosis.
e. cotransport.
5- White blood cells engulf small bacterial cells through:
a. exocytosis.
b. phagocytosis.
c. pinocytosis
d. osmosis.
e. receptor-mediated exocytosis.
6- A noncompetitive inhibitor:
a. binds an enzyme’s active site.
b. can more effectively inhibit an enzyme if the concentration of the enzyme’s substrate is increased.
c. does not bind directly to an enzyme.
d. binds to an enzyme at a location other than the active site.
7- Which of the following statements regarding a signal transduction pathway or its components is accurate?
a. The enzyme phosphodiesterase increases the amount of the second messenger cAMP.
b. Upon binding a ligand, a receptor often changes shape, exposing its active site.
c. The enzyme protein phosphatase adds phosphate groups onto a protein.
d. A G-protein is active when it is bound to ATP.
e. A protein kinase receptor’s kinase domain is located on the extracellular region of the receptor.
8- Where are the proteins of the electron transport chain used in cellular respiration located in animal cells?
a. cytosol
b. mitochondrial outer membrane
c. mitochondrial inner membrane
d. mitochondrial intermembrane space
e. mitochondrial matrix
9- Which of the following are end-products of glycolysis?
a. CO2 and H2O
b. Pyruvate, CO2, and ATP
c. Pyruvate, NADH, and ATP
d. Acetyl CoA, CO2, and NADH
e. Citrate, H2O, and FADH2
10- Where does the Calvin cycle take place?
a. stroma of the chloroplast
b. thylakoid membrane of the chloroplast
c. cytoplasm surrounding the chloroplast
d. interior of the thylakoid (thylakoid space)
e. outer membrane of the chloroplast
a. DNA encodes hereditary information, whereas RNA does not.
b. DNA forms a double-stranded helix, whereas RNA is typically a single-stranded molecule.
c. DNA contains the base uracil, whereas RNA contains the base thymine.
d. DNA contains four different kinds of nucleotides, whereas RNA contains three different kinds of nucleotides.
e. All of the above statements are accurate
Explanation / Answer
Answer:
1. (b) DNA forms a double-stranded helix, whereas RNA is typically a single-stranded molecule.
2. (d) organization of a polypeptide chain into an ? helix or ? pleated sheet.
3. (b) hydrolysis
4. (b) facilitated diffusion
(Since there are multiple questions, the first 4 questions have been answered according to the rules of Chegg)
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