2380175
Beschreibung
Quiz von Shirley Zhu, aktualisiert more than 1 year ago
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Erstellt von Shirley Zhu
vor mehr als 9 Jahre
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Frage 1
Frage
Which of the following scientists is responsible for figuring out that transformation is possible but the transforming factor is unknown?
Antworten
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Avery
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Chargaff
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Griffith
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Melson and Stahl
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Hershey and Chase
Frage 2
Frage
Which of the following scientists is responsible for culturing E. Coli in 15N and then 14N to show that DNA replication is semiconservative?
Antworten
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Avery
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Chargaff
-
Griffith
-
Meselson and Stahl
-
Hershey and Chase
Frage 3
Frage
Which of the following scientists found that nucleic acid, not protein is the genetic material of the T2 bacteriophage?
Antworten
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Avery
-
Chargaff
-
Griffith
-
Meleson and Stahl
-
Hershey and Chase
Frage 4
Frage
Which of the following scientists discovered that when nucleases are added to the transformation reaction, transformation does not occur?
Antworten
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Avery
-
Chargaff
-
Griffith
-
Meselson and Stahl
-
Hershey and Chase
Frage 5
Frage
Which of the following scientists figured out that the percent composition of G equals the percent composition of C in DNA?
Antworten
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Avery
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Chargaff
-
Griffith
-
Meselson and Stahl
-
Hershey and Chase
Frage 6
Frage
Which of the following is a double-stranded molecule that is passed from one generation to the next?
Antworten
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mRNA
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DNA
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tRNA
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RNA polymerase
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ribosome
Frage 7
Frage
Which of the following is a protein that synthesizes RNA?
Antworten
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mRNA
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DNA
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tRNA
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RNA polymerase
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ribosome
Frage 8
Frage
Which of the following contains codons?
Antworten
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mRNA
-
DNA
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tRNA
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RNA polymerase
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ribosome
Frage 9
Frage
Which of the following contains anticodons?
Antworten
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mRNA
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DNA
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tRNA
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RNA polymerase
-
ribosome
Frage 10
Frage
Which of the following is made of two subunits, each composed of protein and RNA
Antworten
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mRNA
-
DNA
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tRNA
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RNA polyermase
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ribosome
Frage 11
Frage
Which of the following attaches to an amino acid on its 3' end?
Antworten
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mRNA
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DNA
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tRNA
-
RNA polymerase
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ribosome
Frage 12
Frage
What is another word for each newly synthesized DNA molecule contains a template strand and a new strand?
Antworten
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DNA polymerase
-
RNA polymerase
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Semiconservative replication
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Antiparallel
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Ribosome
Frage 13
Frage
Which of the following is a part of translation?
Antworten
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DNA polymerase
-
RNA polymerase
-
Semiconservative replication
-
Antiparallel
-
Ribosome
Frage 14
Frage
Which of the following is a part of transcription?
Antworten
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DNA polymerase
-
RNA polymerase
-
Semiconservative
-
Antiparallel
-
Ribosome
Frage 15
Frage
Which of the following is a replication and proofreading enzyme?
Antworten
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DNA polymerase
-
RNA polymerase
-
Semiconservative replication
-
Antiparallel
-
Ribosome
Frage 16
Frage
Which of the following is most active during S phase of interphase?
Antworten
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DNA polymerase
-
RNA polymerase
-
Semiconservative replication
-
Antiparallel
-
Ribosome
Frage 17
Frage
What is the name of the fact that the 5' end of one strand is hydrogen-bonded to the 3' end of the complimentary strand?
Antworten
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DNA polymerase
-
RNA polymerase
-
Semiconservative replication
-
Antiparallel
-
Ribosome
Frage 18
Frage
Which of the following typically occurs only before cell division?
Antworten
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DNA synthesis
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Transcription
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Translation
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Reverse transcription
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Posttranscriptional processing
Frage 19
Frage
What is the name of the process in which polypeptides are assembled at ribosomes?
Antworten
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DNA synthesis
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Transcription
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Translation
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Reverse transcription
-
Posttranscriptional processing
Frage 20
Frage
What is the process by which a strand of DNA is made complimentary to an RNA molecule?
Antworten
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DNA synthesis
-
Transcription
-
Translation
-
Reverse transcription
-
Posttranscriptional processing
Frage 21
Frage
Which of the following involves splicing out introns?
Antworten
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DNA synthesis
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Transcription
-
Translation
-
Reverse transcription
-
Posttranscriptional processing
Frage 22
Frage
Which of the following processes begins at the origin of replication?
Antworten
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DNA synthesis
-
Trancription
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Translation
-
Reverse transcription
-
Posttranscriptional processing
Frage 23
Frage
In which of the processes is a 5' cap and a poly-A tail added to an RNA molecule?
Antworten
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DNA synthesis
-
Transcription
-
Translation
-
Reverse transcription
-
Posttranscriptional processing
Frage 24
Frage
All of the following are mechanisms by which bacteria acquire genetic diversity EXCEPT
Antworten
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Mutation
-
Binary fission
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Transformation
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Transduction
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Conjugation
Frage 25
Frage
If a known single-base substitution in a gene produces a nonfunctional enzyme, how can a scientist test for the presence of this mutation?
Antworten
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Restriction enzymes can be used to test for gene mutations that introduce or eliminate restriction enzyme cleavage sites.
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A test of enzyme activity can be performed on purified enzyme.
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An electron microscope can be used to study the structure of the gene or of the protein.
Frage 26
Frage
DNA 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?
Antworten
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Developmental genes are not expressed in adults.
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No genes expressed in adults are expressed in developing organisms.
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Proteins are not modified as an organism develops
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Proteins are greatly modified as an organism develops
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Most genes in cells are never expressed.
Frage 27
Frage
All of the following are true regarding gene expression EXCEPT
Antworten
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All DNA-containing cells in a particular organism have basically the same genes.
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Different cell types contain different proteins.
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A particular cell makes the exact-same proteins for its entire lifespan.
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Promoters are regions of DNA that help regulate gene expression.
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In eukaryotes, each gene has its own promoter.
Frage 28
Frage
A 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?
Antworten
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DNA sequencing
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Nuclear transplantation (cloning)
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Embryology
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Sexual reproduction
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Nuclear fission
Frage 29
Frage
Referring to question 28, the phenotype of the young mouse (mouse 4) is expected to be
Antworten
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practically identical to the adult mouse from which the nucleus was taken (mouse 1).
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practically identical to the mouse who donated the egg (mouse 2).
-
similar to the mouse who donated the egg (mouse 2).
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a combination of the nuclear and egg donor mice (mice 1 and 2).
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the same as the mouse in which it developed (mouse 3).
Frage 30
Frage
A 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?
Antworten
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The egg donor, not the nucleus donor, determines the phenotype of the clone.
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Usually, but not always, the nucleus donor determines the phenotype of the offspring.
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The egg into which the nucleus was transferred contained extra-nuclear genes.
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The cloned animal only expresses the genes of the egg donor.
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The genes of the nucleus donor were not properly expressed in the offspring.
Frage 31
Frage
DNA from a specific organism is determined to contain 20 percent cytosine. Which of the following can be concluded about the DNA of this organism?
Antworten
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It contains 30 percent G.
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It contains 80 percent G.
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It contains 40 percent A and 40 percent T.
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It contains 20 percent T and 20 percent A
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It contains 30 percent T and 30 percent A
Frage 32
Frage
A yeast cell can be used to express and animal gene. Which of the following best explains why this is possible?
Antworten
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Yeast and animals have mostly the same genes.
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Yeast and animals are both eukaryotes.
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The genetic code is universal.
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DNA replication is similar in yeast and animals.
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Yeast and animals share a recent common ancestor.
Frage 33
Frage
Which of the following statements correctly describes mutations?
Antworten
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They are harmful to the organism but good for the species.
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They are irreversible.
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They are only useful when they occur in germ cells.
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They are a source of variation.
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They drive evolution by creating selective pressures.
Frage 34
Frage
Which of the following statements is true concerning genes?
Antworten
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Genes exist in alternate forms called introns and extrons.
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A gene can code for a polypeptide.
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Genes can cross over during mitosis.
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Recessive alleles are never expressed.
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Genes make up the majority of nucleotide sequences in the human genome.
Frage 35
Frage
All of the following statements regarding nucleic acids are true EXCEPT
Antworten
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Nucleotides consist of a five-carbon sugar, a nitrogenous base and a phosphate.
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Nucleic acids are only synthesized from the 5' --> 3' direction.
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The nitrogenous bases of both DNA and RNA include adenine and guanine.
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RNA does not contain uracil.
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Complementary base pairs of the same (in single-stranded) or different (in double-stranded) nucleic acid strands can hydrogen-bond to each other.
Frage 36
Frage
Which of the following statements about DNA replication is true?
Antworten
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DNA replication begins at the promoter.
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The leading strand of DNA synthesis contains Okazaki fragments.
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Hydrogen bonds must be broken in order to replicate DNA.
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Bacteria have more DNA than eukaryotes, and so they take longer to replicate their DNA.
-
DNA ligase is necessary to build primers on lagging strands during replication.
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