Test
Molecular Genetics
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Preguntas del test (36)
1Which of the following scientists is responsible for figuring out that transformation is possible but the transforming factor is unknown?
- AAvery
- BChargaff
- CGriffith
- DMelson and Stahl
- EHershey and Chase
2Which of the following scientists is responsible for culturing E. Coli in 15N and then 14N to show that DNA replication is semiconservative?
- AAvery
- BChargaff
- CGriffith
- DMeselson and Stahl
- EHershey and Chase
3Which of the following scientists found that nucleic acid, not protein is the genetic material of the T2 bacteriophage?
- AAvery
- BChargaff
- CGriffith
- DMeleson and Stahl
- EHershey and Chase
4Which of the following scientists discovered that when nucleases are added to the transformation reaction, transformation does not occur?
- AAvery
- BChargaff
- CGriffith
- DMeselson and Stahl
- EHershey and Chase
5Which of the following scientists figured out that the percent composition of G equals the percent composition of C in DNA?
- AAvery
- BChargaff
- CGriffith
- DMeselson and Stahl
- EHershey and Chase
6Which of the following is a double-stranded molecule that is passed from one generation to the next?
- AmRNA
- BDNA
- CtRNA
- DRNA polymerase
- Eribosome
7Which of the following is a protein that synthesizes RNA?
- AmRNA
- BDNA
- CtRNA
- DRNA polymerase
- Eribosome
8Which of the following contains codons?
- AmRNA
- BDNA
- CtRNA
- DRNA polymerase
- Eribosome
9Which of the following contains anticodons?
- AmRNA
- BDNA
- CtRNA
- DRNA polymerase
- Eribosome
10Which of the following is made of two subunits, each composed of protein and RNA
- AmRNA
- BDNA
- CtRNA
- DRNA polyermase
- Eribosome
11Which of the following attaches to an amino acid on its 3' end?
- AmRNA
- BDNA
- CtRNA
- DRNA polymerase
- Eribosome
12What is another word for each newly synthesized DNA molecule contains a template strand and a new strand?
- ADNA polymerase
- BRNA polymerase
- CSemiconservative replication
- DAntiparallel
- ERibosome
13Which of the following is a part of translation?
- ADNA polymerase
- BRNA polymerase
- CSemiconservative replication
- DAntiparallel
- ERibosome
14Which of the following is a part of transcription?
- ADNA polymerase
- BRNA polymerase
- CSemiconservative
- DAntiparallel
- ERibosome
15Which of the following is a replication and proofreading enzyme?
- ADNA polymerase
- BRNA polymerase
- CSemiconservative replication
- DAntiparallel
- ERibosome
16Which of the following is most active during S phase of interphase?
- ADNA polymerase
- BRNA polymerase
- CSemiconservative replication
- DAntiparallel
- ERibosome
17What is the name of the fact that the 5' end of one strand is hydrogen-bonded to the 3' end of the complimentary strand?
- ADNA polymerase
- BRNA polymerase
- CSemiconservative replication
- DAntiparallel
- ERibosome
18Which of the following typically occurs only before cell division?
- ADNA synthesis
- BTranscription
- CTranslation
- DReverse transcription
- EPosttranscriptional processing
19What is the name of the process in which polypeptides are assembled at ribosomes?
- ADNA synthesis
- BTranscription
- CTranslation
- DReverse transcription
- EPosttranscriptional processing
20What is the process by which a strand of DNA is made complimentary to an RNA molecule?
- ADNA synthesis
- BTranscription
- CTranslation
- DReverse transcription
- EPosttranscriptional processing
21Which of the following involves splicing out introns?
- ADNA synthesis
- BTranscription
- CTranslation
- DReverse transcription
- EPosttranscriptional processing
22Which of the following processes begins at the origin of replication?
- ADNA synthesis
- BTrancription
- CTranslation
- DReverse transcription
- EPosttranscriptional processing
23In which of the processes is a 5' cap and a poly-A tail added to an RNA molecule?
- ADNA synthesis
- BTranscription
- CTranslation
- DReverse transcription
- EPosttranscriptional processing
24All of the following are mechanisms by which bacteria acquire genetic diversity EXCEPT
- AMutation
- BBinary fission
- CTransformation
- DTransduction
- EConjugation
25If a known single-base substitution in a gene produces a nonfunctional enzyme, how can a scientist test for the presence of this mutation?
- ARestriction enzymes can be used to test for gene mutations that introduce or eliminate restriction enzyme cleavage sites.
- BA test of enzyme activity can be performed on purified enzyme.
- CAn electron microscope can be used to study the structure of the gene or of the protein.
26DNA analysis of adult and developing frogs reveals that the same genes are present in all the cells of the frog throughout its development. However, certain proteins found in developing frogs are absent from adult frogs. Which of the following best explains this observation?
- ADevelopmental genes are not expressed in adults.
- BNo genes expressed in adults are expressed in developing organisms.
- CProteins are not modified as an organism develops
- DProteins are greatly modified as an organism develops
- EMost genes in cells are never expressed.
27All of the following are true regarding gene expression EXCEPT
- AAll DNA-containing cells in a particular organism have basically the same genes.
- BDifferent cell types contain different proteins.
- CA particular cell makes the exact-same proteins for its entire lifespan.
- DPromoters are regions of DNA that help regulate gene expression.
- EIn eukaryotes, each gene has its own promoter.
28A nucleus was removed from a fibroblast cell of an adult mouse (mouse 1). The nucleus was then inserted into an egg cell from which the nucleus was removed (the egg cell was from a different mouse, 2). The resulting diploid cell began to divide, and the young embryo was implanted into the uterus of a third mouse and allowed to develop. The third mouse eventually gave birth to a healthy mouse (mouse 4). Which of the following correctly identifies the procedures described above?
- ADNA sequencing
- BNuclear transplantation (cloning)
- CEmbryology
- DSexual reproduction
- ENuclear fission
29Referring to question 28, the phenotype of the young mouse (mouse 4) is expected to be
- Apractically identical to the adult mouse from which the nucleus was taken (mouse 1).
- Bpractically identical to the mouse who donated the egg (mouse 2).
- Csimilar to the mouse who donated the egg (mouse 2).
- Da combination of the nuclear and egg donor mice (mice 1 and 2).
- Ethe same as the mouse in which it developed (mouse 3).
30A cloned animal may exhibit traits that are not present in the animal from which it was cloned (the nucleus donor). Which of the following best explains this observation?
- AThe egg donor, not the nucleus donor, determines the phenotype of the clone.
- BUsually, but not always, the nucleus donor determines the phenotype of the offspring.
- CThe egg into which the nucleus was transferred contained extra-nuclear genes.
- DThe cloned animal only expresses the genes of the egg donor.
- EThe genes of the nucleus donor were not properly expressed in the offspring.
31DNA from a specific organism is determined to contain 20 percent cytosine. Which of the following can be concluded about the DNA of this organism?
- AIt contains 30 percent G.
- BIt contains 80 percent G.
- CIt contains 40 percent A and 40 percent T.
- DIt contains 20 percent T and 20 percent A
- EIt contains 30 percent T and 30 percent A
32A yeast cell can be used to express and animal gene. Which of the following best explains why this is possible?
- AYeast and animals have mostly the same genes.
- BYeast and animals are both eukaryotes.
- CThe genetic code is universal.
- DDNA replication is similar in yeast and animals.
- EYeast and animals share a recent common ancestor.
33Which of the following statements correctly describes mutations?
- AThey are harmful to the organism but good for the species.
- BThey are irreversible.
- CThey are only useful when they occur in germ cells.
- DThey are a source of variation.
- EThey drive evolution by creating selective pressures.
34Which of the following statements is true concerning genes?
- AGenes exist in alternate forms called introns and extrons.
- BA gene can code for a polypeptide.
- CGenes can cross over during mitosis.
- DRecessive alleles are never expressed.
- EGenes make up the majority of nucleotide sequences in the human genome.
35All of the following statements regarding nucleic acids are true EXCEPT
- ANucleotides consist of a five-carbon sugar, a nitrogenous base and a phosphate.
- BNucleic acids are only synthesized from the 5' --> 3' direction.
- CThe nitrogenous bases of both DNA and RNA include adenine and guanine.
- DRNA does not contain uracil.
- EComplementary base pairs of the same (in single-stranded) or different (in double-stranded) nucleic acid strands can hydrogen-bond to each other.
36Which of the following statements about DNA replication is true?
- ADNA replication begins at the promoter.
- BThe leading strand of DNA synthesis contains Okazaki fragments.
- CHydrogen bonds must be broken in order to replicate DNA.
- DBacteria have more DNA than eukaryotes, and so they take longer to replicate their DNA.
- EDNA ligase is necessary to build primers on lagging strands during replication.
Información
- Descripción
- High School AP Biology Test sobre Molecular Genetics, creado por Shirley Zhu el 26/03/2015.
- Autor
- Shirley Zhu
- Idioma
- English
- Visitas
- 85
- Etiquetas
- Valoración
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