7. Which of the following statement is True for a virulent phage?
(A) phage replicates without destroying host cell
(B) phage genome integrates in the chromosome of bacteria
(C) a large number of phages are released
(D) bacterial cell contains phage DNA
(E) all statements are true

複選題3. Which substance could be an enzyme cofactor? (A) protein (B) polypeptide (C) zinc atom (D) ribosome (E) vitamin

4. How does inhibition of an enzyme-catalyzed reaction by a competitive inhibitor differ from inhibition by a noncompetitive inhibitor? (A) Competitive inhibitors interfere with the enzyme； noncompetitive inhibitors interfere with the reactants. (B) Competitive inhibitors bind to the enzyme reversibly； noncompetitive inhibitors bind to it irreversibly. (C) Competitive inhibitors change the enzyme's tertiary structure； noncompetitive inhibitors cause polypeptide subunits to dissociate. (D) Competitive inhibitors bind to the active site of the enzyme； noncompetitive inhibitors bind to a different site. (E) Noncompetitive inhibitors bind to the active site of the enzyme； competitive inhibitors bind to a different site.

5. Which statement regarding the function of mitosis is false? (A) Mitosis allows organisms to grow. (B) Mitosis promotes genetic diversity. (C) Mitosis is necessary for asexual reproduction in eukaryotes. (D) Mitosis promotes repair tissues. (E) All are incorrect.

6. Mendel's law of independent assortment states that (A) chromosomes sort independently of each other during mitosis and meiosis. (B) independent sorting of genes produces polyploid plants under some circumstances. (C) the allele that a gamete receives for one gene does not influence the allele the gamete receives for another gene. (D) genes are sorted concurrently during gamete formation. (E) genes are transmitted to progeny.

8. What results from conjugation between a bacterium that lacks an F factor (F−) and a bacterium that has an F factor on its chromosome (F+)? (A) The F− bacterium ends up carrying one or more plasmids from the F+ bacterium； the F+ bacterium is unchanged. (B) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F− bacterium, and the F− bacterium ends up with an unaltered chromosome. (C) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F− bacterium, and the F− bacterium ends up with a chromosome that lacks those genes. (D) The F− bacterium ends up with a recombinant chromosome that carries some genes from the F+ bacterium, and the F+ bacterium ends up with an unaltered chromosome. (E) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F− bacterium, and the F+ bacterium ends up with an unaltered chromosome.

9. Below are three statements. Which choice properly matches the statements with the correct biological processes?I. This occurs in the nucleus of eukaryotic cells with DNA polymerase.II. Transfer RNAs bind amino acids in the cytoplasm.III. An RNA polymerase enzyme is required.(A) I: replication； II: translation； III: transcription(B) I: translation； II: translation； III: replication(C) I: transcription； II: translation； III: translation(D) I: replication； II: transcription； III: replication(E) I: replication； II: transcription； III: transcription

10. Speciation without geographic isolation is called ________ speciation. (A) convergent (B) allopatric (C) incomplete (D) diversifying (E) sympatric

11.The process through which species not closely related may come to resemble one another if they live in a similar environment is known as (A) coevolution. (B) homology. (C) convergent evolution. (D) paedomorphosis. (E) diversified

12.What is an example of exaptation? (A) Some insects do not develop wings when resources are plentiful. (B) Human middle ear bones are derived from ancestral gill arch tissue. (C) Wings of bats and wings of birds are homologous. (D) Mutation rates can increase at higher temperatures. (E) Mutation rates can change at various times.

13. The largest group of prokaryotes is the ________, which obtain both energy and carbon from ________. (A) autotrophs； inorganic molecules (B) chemoautotrophs； decaying organic material (C) chemoheterotrophs； organic molecules (D) photoautotrophs； light (E) chemoautotrophs； organic material