1A.) Q1.) What is the function of the nuclear pore complex found in eukaryotes?
ID: 226832 • Letter: 1
Question
1A.)
Q1.) What is the function of the nuclear pore complex found in eukaryotes?
A) It regulates the movement of proteins and RNAs into and out of the nucleus.
B) It synthesizes the proteins required to copy DNA and make mRNA.
C) It selectively transports molecules out of the nucleus, but prevents all inbound
molecules from entering the nucleus.
D) It assembles ribosomes from raw materials that are synthesized in the nucleus.
Q2.) Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from _____.
A) a bacterium
B) an animal but not a plant
C) nearly any eukaryotic organism
D) a plant but not an animal
Q3.) Which of the following is true of osmosis?
A) Osmosis only takes place in red blood cells.
B) Osmosis is an energy-demanding or "active" process.
C) In osmosis, water moves across a membrane from areas of lower solute concentration
to areas of higher solute concentration.
D) In osmosis, solutes move across a membrane from areas of lower water concentration
to areas of higher water concentration.
Q4.) What will happen to a red blood cell (RBC), which has an internal ion concentration of about 0.9 percent, if it is placed into a beaker of pure water?
A) The cell would shrink because the water in the beaker is hypotonic relative to the
cytoplasm of the RBC.
B) The cell would shrink because the water in the beaker is hypertonic relative to the
cytoplasm of the RBC.
C) The cell would swell because the water in the beaker is hypotonic relative to the
cytoplasm of the RBC.
D) The cell will remain the same size because the solution outside the cell is isotonic.
Q5.) White blood cells engulf bacteria using _____.
A) phagocytosis
B) pinocytosis
C) osmosis
D) receptor-mediated exocytosis
Q6.) In solution, why do hydrolysis reactions occur more readily than condensation reactions?
A) Hydrolysis increases entropy and is exergonic.
B) Hydrolysis raises G, or Gibbs free energy.
C) Hydrolysis decreases entropy and is exergonic.
D) Hydrolysis increases entropy and is endergonic.
Q7.) During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a G of -20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the G for the new reaction?
A) -40 kcal/mol
B) -20 kcal/mol
C) 0 kcal/mol
D) +20 kcal/mol
Q8.) In the figure above, why does the reaction rate plateau at higher reactant concentrations?
A) Feedback inhibition by product occurs at high reactant concentrations.
B) Most enzyme molecules are occupied by substrate at high reactant concentrations.
C) The reaction nears equilibrium at high reactant concentrations.
D) The rate of the reverse reaction increases with reactant concentration.
Q9.) Which curves on the above graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°C or higher?
A) curves 1 and 5
B) curves 2 and 5
C) curves 3 and 4
D) curves 3 and 5
Q10.) Which temperature and pH profile curves on the above graphs were most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?
A) curves 1 and 4
B) curves 1 and 5
C) curves 2 and 4
D) curves 3 and 4
Q11.) Which of the following terms best describes the forward reaction in the above figure?
A) endergonic, G > 0
B) exergonic, G < 0
C) endergonic, G < 0
D) exergonic, G > 0
Q12.) Which of the following in the above figure would be the same in either an enzymecatalyzed or a noncatalyzed reaction?
A) a
B) b
C) c
D) d
Q13.) Which of the following represents the activation energy required for the enzymecatalyzed reaction in the above figure?
A) a
B) b
C) c
D) d
Q14.) Which of the listed statements describes the results of the following reaction?
C6H12O6 + 6 O2 6 CO2 + 6 H2O + Energy
A) C6H12O6 is oxidized and O2 is reduced.
B) O2 is oxidized and H2O is reduced.
C) CO2 is reduced and O2 is oxidized.
D) O2 is reduced and CO2 is oxidized.
Q15.) For each mole of glucose (C6H12O6) oxidized by cellular respiration, how many moles of CO2 are released in the citric acid cycle ?
A) 2
B) 4
C) 6
D) 32
Q16.) In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve?
A) It allows for an increased rate of glycolysis.
B) It allows for an increased rate of the citric acid cycle.
C) It increases the surface for oxidative phosphorylation.
D) It increases the surface for substrate-level phosphorylation.
Q17.) Fatty acids usually have an even number of carbons in their structures. They are catabolized by a process called beta-oxidation. The end products of the metabolic pathway are acetyl groups of acetyl CoA molecules. These acetyl groups _____.
A) directly enter the electron transport chain
B) directly enter the energy-yielding stages of glycolysis
C) are directly decarboxylated by pyruvate dehydrogenase
D) directly enter the citric acid cycle
Q18.) Vinblastine, a drug that inhibits microtubule polymerization, is used to treat some forms of cancer. Cancer cells given vinblastine would be unable to _____.
A) form cleavage furrows during cell division
B) migrate by amoeboid movement
C) separate chromosomes during cell division
D) maintain the shape of the nucleus
Q19.) Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as _____ is to _____.
A) exergonic; spontaneous
B) exergonic; endergonic
C) free energy; entropy
D) work; energy
Q20.) Starting with citrate, which of the following combinations of products would result from three acetyl CoA molecules entering the citric acid cycle (see the accompanying figure)?
A) 1 ATP, 2 CO2, 3 NADH, and 1 FADH2
B) 3 ATP, 3 CO2, 3 NADH, and 3 FADH2
C) 3 ATP, 6 CO2, 9 NADH, and 3 FADH2
D) 38 ATP, 6 CO2, 3 NADH, and 12 FADH2
+100 +9.0 +80 +70 +6.0 +5.0 +40 +3.0 +1.0 2.0 Concentration of reactants, micromolar +12.0Explanation / Answer
please find below answer of first 4 question-
Q1.) What is the function of the nuclear pore complex found in eukaryotes?
Answer-A) It regulates the movement of proteins and RNAs into and out of the nucleus.
Description-The nucleus of a eukaryotic cell contains the DNA, the genetic material of the cell.The nuclear envelope surrounds the nucleus with a double membrane with multiple pores. The pores regulate the passage of macromolecules like proteins and RNA, but permit free passage of water, ions, ATP and other small molecules.
Q2.) Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes,plasma membrane, and mitochondria. It could be a cell from _____.
Answer-A) a bacterium
Description-Enzymes associated with respiration of the prokaryotic cell-In bacterium located on the infoldings.Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure ofprokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal .
Q3.) Which of the following is true of osmosis?
Answer-
C) In osmosis, water moves across a membrane from areas of lower solute concentration to areas of higher solute concentration
Description-Osmosis. In osmosis, water always moves from an area of higher water concentration to one of lower concentration. In the diagram shown, the solutecannot pass through the selectively permeable membrane, but the water can
Q4.) What will happen to a red blood cell (RBC), which has an internal ion concentration of about 0.9 percent, if it is placed into a beaker of pure water?
Answer-
C) The cell would swell because the water in the beaker is hypotonic relative to the cytoplasm of the RBC.
Description-If red blood cells are placed in pure water, water enters them by osmosis and thered blood cells swell up and burst. If cells are placed in a concentrated solution,water leaves them by osmosis and they are unable to function
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