Quiz
Ch 4 DNA, RNA, and the Flow of Genetic Information
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Perguntas do quiz (48)
1What is the correct order of the central dogma of gene expression?
- ADNA--> Translation-->RNA--> Transcription-->Protein
- BDNA--> Transcription-->RNA-->Translation-->Protein
- CRNA-->Transcription-->DNA-->Translation-->Protein
- DRNA-->Translation-->DNA-->Transcription-->Protein
2What are components of a nucleotide?
- ASugar
- BNitrogen containing base
- CPhosphate
- DCarbon
3RNA and DNA differ in the sugar component of one of the bases
- AVerdadeiro
- BFalso
4What contains the sugar ribose?
- ARNA
- BDNA
- CmRNA
- DtRNA
5Purines are
- AAdenine and Guanine
- BAdenine and Cytosine
- CGuanine and thymine
- DCytosine and thymine
6Pyrimidines are
- AAdenine and guanine
- BAdenine and thymine
- CCytosine and adenine
- DCytosine and thymine
7Nucleic acid sequences are written in what direction?
- AOne end has a phosphoryl group attached to the 3'carbon atom of the sugar and one end has a free hydroxyl attached to the 5' carbon of the sugar
- BOne end has a phosphoryl group attached to the 5' carbon atom of the sugar and one end has a free hydroxyl attached to the 3' carbon of the sugar
8A base bound to a sugar is called a [blank_start]nucleoside[blank_end]
- Anucleoside
9Nucleoside of DNA are
- ADeoxyadenosine, deoxyguanosine, deoxycytidine, and deoxythymidine
- BAdenine, guanine, cytosine, thymine
- Cdeoxyadenosine, deoxyguanosine, deoxycytosine, deoxyuracil
10Deoxythymidine, rarely occurs in RNA, simply called thymidine
- AVerdadeiro
- BFalso
11Nucleoside of RNA are
- Adeoxyadenosine, deoxyguanosine, deoxycytidine, and deoxythymidine
- Badenosine, guanosine, cytidine, and uridine
- Cadenosine, guanosine, cytidine, thymidine
- Ddeoxyadenosine, deoxyguanosine, deoxycytidine, and deoxyuracil
12A nucleotide is a nucleoside with only 1 phosphoryl group attached
- AVerdadeiro
- BFalso
13Nucleotide [blank_start]triphosphates[blank_end] are the building blocks of [blank_start]DNA[blank_end] and [blank_start]RNA[blank_end]
- Atriphosphates
- BAdenosine
- Ctrisugars
- DDNA
- EtRNA
- FmRNA
- GRNA
- HmRNA
- ItRNA
14DNA molecules are very long some consisting of more than [blank_start]1 billion[blank_end] nucleotides
- A1 billion
15The double helix is stabilized by hydrogen bonds and van der Walls interactions
- AVerdadeiro
- BFalso
16Adenine always forms hydrogen bonds with [blank_start]thymine[blank_end] while guanine forms hydrogen bonds with [blank_start]cytosine[blank_end]
- Athymine
- Bcytosine
- Ccytosine
- Dthymine
17The helix is stabilized by hydrogen bonds between base pairs as well as hydrophobic interactions called
- Astacking forces
- Bsemiconservative replication
- CVan der Walls interactions
18Because of the base pair rules, the sequence of one strand determines the sequence of the partner strand
- AVerdadeiro
- BFalso
19Because the two daughter helices have one parent strand one newly synthesized strand, the replication process is called
- AStacking forces
- BSemiconservative replication
- CConservative replication
- DDNA polymerase
20What are the key characteristics of DNA synthesis
- AFour deoxynucleoside triphosphates and Mg2+ are required
- BA template strand is used to direct RNA synthesis
- CA primer from which the new strand grows must be absent
- DMany DNA polymerases have nuclease activity that allows for the removal of mismatched bases
21Some viruses, such as tobacco mosaic virus, have [blank_start]RNA[blank_end] genomes that are replicated by [blank_start]RNA[blank_end]-directed [blank_start]RNA[blank_end] polymerases
- ARNA
- BRNA
- CRNA
22Retroviruses, such as HIV-1, have single-stranded RNA genomes that are converted into DNA double helices by the action of
- ATranscriptase
- BTranslation
- CReverse transcriptase
- DReverse translation
23All cellular RNA is synthesized by RNA polymerases
- AVerdadeiro
- BFalso
24The synthesis of RNA from a DNA template is called translation, a process catalyzed by RNA polymerase
- AVerdadeiro
- BFalso
25RNA polymerase has the following requirements
- ATemplate
- BThe sequence of the newly-synthesized RNA is complementary to the DNA template
- Ccoding strand
- DActivated precursors in the form of the 4 ribonucleoside
- EDivalent metal ions
- FBase pair
26RNA polymerase initiates and elongates the RNA product, with the chain growing in the [blank_start]5'[blank_end] to [blank_start]3'[blank_end] direction
- A5'
- B3'
27Several kinds of RNA play a role in gene expression, what are three most abundant classes of RNA
- ARibosomal RNA
- BMessenger RNA
- CTransfer RNA
- DTranslate RNA
28RNA polymerases take instructions from DNA templates
- AVerdadeiro
- BFalso
29Transcription begins near the [blank_start]promoter[blank_end] sites and ends at [blank_start]terminator[blank_end] sites
- Apromoter
- Bterminator
30Promoters are
- ASpecific DNA sequences that direct RNA polymerase to the proper initiation site
- BSpecific RNA sequences that direct DNA polymerase to the proper initiation site
- CSpecific DNA sequences that direct RNA polymerase to the proper terminator site
- DSpecific RNA sequences that direct DNA polymerase to the proper terminator site
31The average of variation in the sequence of a promoter for different genes is called [blank_start]consensus[blank_end] sequence
- Aconsensus
32The RNA complement of the DNA stop signal forms a hairpin structure, followed by several thymine residues
- AVerdadeiro
- BFalso
33What is required for transcription termination
- AProtein rho
- BProtein thy
- CProtein gly
- DProtein leu
34In eukaryotes,
- AThe 3' end of mRNA is modified by the attachment of a cap structure while the 5' end acquires a poly(A)tail
- BThe 5' end of mRNA is modified by the attachment of a cap structure while the 3' end acquires a poly(A)tail
- CThe 5' end of tRNA is modified by the attachment of a cap structure while the 3' end acquires a poly(A)tail
- DThe 3' end of tRNA is modified by the attachment of a cap structure while the 5' end acquires a poly(A)tail
35Transfer RNA molecules react with
- Aspecific amino acids in a reaction catalyzed by aminoacyl-tRNA synthetases
- Bone amino acids in a reaction catalyzed by aminoacyl-tRNA synthetases
- Cspecific amino acids in a reaction catalyzed by aminoacyl-mRNA synthetases
- DSpecific amino acids in a reaction catalyzed by aminoacyl-rRNA synthetases
36Transfer RNA molecules also contain a template recognition site, called
- Athe anticodon
- Bthe codon
- Cthe initiator
- Dthe terminator
37Anticodon consist of
- A2 bases
- B3 bases
- Ccomplementary 3 base sequence in the rRNA
- Dcomplementary 3 base sequence in the mRNA
38Protein synthesis is the process of translation
- AVerdadeiro
- BFalso
39Characteristics of the genetic code are
- Athree nucleotides, called a codon
- Bcode is overlapping
- Ccode is nonoverlapping
- Dcode has punctuation
- Ecode has no punctuation
- FCode is read from 5' end of the mRNA to the 3' end
- Gcode is degenerate in that some amino acids are encoded by more than one codon
40Degeneracy
- Aamino acids encoded by 1 codon
- Bamino acids encoded by more than 1 codon
- Cminimizes deleterious effects of mutations
- Dmaximizes deleterious effects of mutations
41Messenger RNA is translated on ribosomes
- AVerdadeiro
- BFalso
42The genetic code is nearly universal
- AVerdadeiro
- BFalso
43Eukaryotic genes are discontinuous
- Awith coding regions called exons, interrupted by noncoding regions called introns
- Bwith noncoding regions called introns, interrupted by coding regions called exons
- Cwith coding regions called introns, interrupted by noncoding regions called exons
- Dwith interrupted regions called exons, coding regions called introns
44Many exons encode
- Aprotein domains
- Bamino acids
- CrRNA
45Introns almost always begin with GU and end with an AG
- AVerdadeiro
- BFalso
46The gene for the β- chain of human hemoglobin has [blank_start]3[blank_end] exons and [blank_start]2[blank_end] introns
- A3
- B2
47RNA processing generates mature RNA
- AVerdadeiro
- BFalso
48[blank_start]Pre-messeneger[blank_end] RNA contains exons and introns
- APre-messeneger
- BtRNA
- CmRNA
- DrRNA
Informações
- Descrição
- Biochemistry
- Autor
- Amy Arce
- Idioma
- English
- Visualizações
- 57
- Histórico
- Criado em 5 out 2015 · atualizado em 16 out 2016
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