Please answer all questions.
Which of the following types of transporters would be utilizedto move two different types of molecules across the cell membranein the same direction?
| a. | Uniporter |
| b. | Symporter/Cotransporter |
| c. | Antiporter |
| d. | Chemiporter |
| e. | Protoporter |
Which of the following taxonomic groupings ismost specific (i.e., contains a set of organismsthat is most related/similar in nature)?
| a. | Domain |
| b. | Class |
| c. | Order |
| d. | Kingdom |
| e. | Family |
Bryce is interested in examining the effect of a new drug,Enlighten, on improving the mood of college students who are aboutto sit for their final exams. Specifically, he is interested indetermining if it has a greater effect than no drug at all. Theindependent variable in Bryce's experiment is___________________.
| a. | The mood of college students enrolled in his study |
| b. | The number of college students taking part in the research |
| c. | The type of drug (placebo vs. Enlighten) received bythe research participants |
| d. | The amount of drug administered to participants in the study |
| e. | None of the above |
Which of the following descriptors best characterizes anon-spontaneous reaction?
| a. | Occurs without the input of ATP; occurs quickly; results in anegative change in free energy |
| b. | Often coupled to exergonic reactions; rate of reaction varies;results in a negative change in free energy |
| c. | Occurs without input of ATP; rate of reaction varies; results ina positive change in free energy |
| d. | Often coupled to exergonic reactions; occurs quickly; results ina positive change in free energy |
| e. | Often coupled to exergonic reactions; rate of reaction varies;results in a positive change in free energy |
In guinea pigs, black coats (B) are dominant to brown coats (b).What would be the genotype of a guinea pig that is homozygousdominant for coat color?
In guinea pigs, black coats (B) are dominant to brown coats (b).A guinea pig that is heterozygous for coat color would producewhich of the following gametes?
| a. | Bb |
| b. | B |
| c. | b |
| d. | Both B & C |
| e. | All of the above are gametes that would be produced bya heterozygote |
In guinea pigs, black coats (B) are dominant to brown coats (b).A female guinea pig that is homozygous recessive for coat colormates with a male guinea pig that is heterozygous for coat color.What percentage of their offspring will have black coats?
| a. | 0% |
| b. | 25% |
| c. | 50% |
| d. | 75% |
| e. | 100% |
In guinea pigs, black coats (B) are dominant to brown coats (b).A female guinea pig that is homozygous recessive for coat colormates with a male guinea pig that is heterozygous for coat color.What would be the genotypic ratio of theF1generation?
| a. | 3BB: 1bb |
| b. | 1BB: 2Bb: 1bb |
| c. | 2BB: 1Bb: 1bb |
| d. | 2BB: 2Bb |
| e. | 2Bb: 2bb |
If two guinea pigs in the F1 generation described inthe question above mated, at random, what would be the likelihoodthat they would produce an offspring with a black coat?
| a. | 0% |
| b. | 25% |
| c. | 50% |
| d. | 75% |
| e. | It is impossible to tell given the information provided |
Certain genes, such as the non-structural genes that producerRNA, are unregulated and have essentially constant levels of geneexpression (i.e., they are always \"on\"). These genes are describedas being ___________________________.
| a. | Inducible |
| b. | Constitutive |
| c. | Elongated |
| d. | Repressible |
| e. | Spontaneous |
In both prokaryotic and eukaryotic cells, gene regulation occursprimarily at the transcriptional level. This is because earlyregulation of gene expression prevents the organism from needlesslyexpending energy and resources to produce proteins it has no needfor.
| a. | True |
| b. | False; most gene regulation occurs at the post-translationallevel |
| c. | False; only eukaryotic organisms regulate gene expression at thetranscriptional level |
Transcription and translation occur simultaneously in eukaryoticorganisms because both events take place in the cytoplasm.
| a. | True |
| b. | False; transcription and translation occur simultaneously inprokaryotic organisms because both events take place in thecytoplasm |
| c. | False; transcription and translation occur simultaneously inboth eukaryotic and prokaryotic organisms because bothevents take place in the cytoplasm |
