Post Lecture Quiz 2 Flashcards
The label on a container of margarine lists “hydrogenated vegetable oil” as the major ingredient. What is the result of adding hydrogens to vegetable oil?
1) The hydrogenated vegetable oil has a lower melting point.
2) The hydrogenated vegetable oil is less likely to clog arteries.
3) The hydrogenated vegetable oil has fewer trans fatty acids.
4) The hydrogenated vegetable oil has more “kinks” in the fatty acid chains.
5) The hydrogenated vegetable oil stays solid at room temperature.
5) The hydrogenated vegetable oil stays solid at room temperature.
If a DNA sample were composed of 30% adenine, what would be the percentage of thymine?
1) 30
2) 20
3) 80
4) 40
5) impossible to tell from the information given
1) 30
Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?
1) 5´-AGCT-3´ with 5´-TCGA-3´
2) 5´-ATGC-3´ with 5´-GCAT-3´
3) 5´-GCGC-3´ with 5´-TATA-3’
4) All of these pairs are correct.
5) 5´-purine-pyrimidine-purine-pyrimidine-3´ with 3´-purine-pyrimidine-purine-pyrimidine-5´
2) 5´-ATGC-3´ with 5´-GCAT-3
Starch and cellulose are both polymers of glucose. Why can we utilize one for energy and not the other?
1) The glucose in starch is a cis isomer while the glucose in cellulose is a trans isomer
2) We have bacteria in our gut that can break down starch but not cellulose
3) Cellulose is highly branched whereas starch is not
4) Our enzymes are capable of breaking the a glycosidic linkages in starch but not the b glycosidic linkages in cellulose
4) Our enzymes are capable of breaking the a glycosidic linkages in starch but not the b glycosidic linkages in cellulose
The structural level of a protein least
affected by a disruption in hydrogen bonding is the
1) primary level.
2) All structural levels are equally affected.
3) secondary level.
4) quaternary level.
5) tertiary level
1) primary level.
The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that
1) plant cells can have lower surface-to-volume ratios than animal cells because plant cells synthesize their own nutrients.
2) animal cells are more spherical, whereas plant cells are elongated.
3) plant cells are capable of having a much higher surface-to-volume ratio than animal cells.
4) plant cells contain a large vacuole that reduces the volume of the cytoplasm.
5) plant cells have a much more highly convoluted (folded) plasma membrane than animal cells.
4) plant cells contain a large vacuole that reduces the volume of the cytoplasm.
If radioactive deoxythymidine triphosphate (dTTP) is added to a culture of rapidly growing eukaryotic cells, where in the cell would you expect to find the greatest concentration of radioactivity?
1) endoplasmic reticulum
2) nucleoid
3) cytoplasm
4) nucleus
5) ribosomes
4) nucleus
Which of the following statements is/are true regarding the chemical reaction illustrated in the figure?
1) It joins two fatty acids together.
2) It results in a peptide bond.
3) It is a hydrolysis reaction.
4) It is a hydrolysis reaction and it results in a peptide bond.
5) It is a hydrolysis reaction, it results in a peptide bond, and it joins two fatty acids
together.
2) It results in a peptide bond.
A cell with a predominance of free ribosomes is most likely
1) producing primarily cytoplasmic proteins.
2) producing primarily proteins for secretion.
3) enlarging its vacuole.
4) constructing an extensive cell wall or extracellular matrix.
5) digesting large food particles.
1) producing primarily cytoplasmic proteins.
Vinblastine, a drug that inhibits microtubule polymerization, is used to treat some forms of cancer. Cancer cells given vinblastine would be unable to
1) migrate by amoeboid movement.
2) extend pseudopods.
3) maintain the shape of the nucleus.
4) form cleavage furrows during cell division.
5) separate chromosomes during cell division.
5) separate chromosomes during cell division.
