Question 1

A ribozyme is

Accepted Answer

A) an RNA-protein complex that cleaves DNA. 
B) an enzyme that catalyzes the assembly of ribosomes. 
C) a small RNA that can catalyze a specific chemical reaction. 
D) a stretch of uracil in RNA that directs splicing. 
A) an RNA-protein complex that cleaves DNA. 
B) an enzyme that catalyzes the assembly of ribosomes. 
C) a small RNA that can catalyze a specific chemical reaction. 
D) a stretch of uracil in RNA that directs splicing. C

Question 2

Which choice is the correct sequence from smallest to largest?

Accepted Answer

A) Amino acid,peptide,polypeptide,protein 
B) Protein,polypeptide,peptide,amino acid 
C) Amino acid,DNA,peptide,gene 
D) Peptide,polypeptide,amino acid,protein 
A) Amino acid,peptide,polypeptide,protein 
B) Protein,polypeptide,peptide,amino acid 
C) Amino acid,DNA,peptide,gene 
D) Peptide,polypeptide,amino acid,protein A

Question 3

A(n)_____ carries a specific amino acid to a ribosome,where the amino acid bonds to another.

Accepted Answer

A) mtDNA 
B) rRNA 
C) mRNA 
D) tRNA 
A) mtDNA 
B) rRNA 
C) mRNA 
D) tRNA D

Question 4

The scientists who identified a set of coordinately regulated genes,called an operon,responsible for lactose metabolism in E.coli were

Accepted Answer

A) Watson and Crick. 
B) Meselson and Stahl. 
C) Jacob and Monod. 
D) Hershey and Chase. 
A) Watson and Crick. 
B) Meselson and Stahl. 
C) Jacob and Monod. 
D) Hershey and Chase.

Question 5

Which codon halts ribosomes?

Accepted Answer

A) UAG 
B) AUG 
C) UUU 
D) ATG 
A) UAG 
B) AUG 
C) UUU 
D) ATG

Question 6

A codon consists of three consecutive

Accepted Answer

A) DNA bases. 
B) amino acids. 
C) tRNA bases 
D) mRNA bases. 
A) DNA bases. 
B) amino acids. 
C) tRNA bases 
D) mRNA bases.

Question 7

_____ "tag" misfolded proteins so that they can be refolded or sent to proteasomes.

Accepted Answer

A) Chaperones 
B) Folding catalysts 
C) Signal sequences 
D) Ubiquitin molecules 
A) Chaperones 
B) Folding catalysts 
C) Signal sequences 
D) Ubiquitin molecules

Question 8

There are _____ different sequences of codons possible in the genetic code.

Accepted Answer

A) 3 
B) 4 
C) 16 
D) 64 
A) 3 
B) 4 
C) 16 
D) 64

Question 9

Transcription and replication are alike in that both

Accepted Answer

A) are guided by complementary base pairing. 
B) are regulated by homeobox genes. 
C) require DNA polymerase. 
D) require a promoter and RNA polymerase. 
A) are guided by complementary base pairing. 
B) are regulated by homeobox genes. 
C) require DNA polymerase. 
D) require a promoter and RNA polymerase.

Question 10

DNA replication is necessary so that

Accepted Answer

A) transcription can proceed. 
B) translation can proceed. 
C) genetic information is not lost as the information in DNA sequences is accessed. 
D) the cell does not die when it divides. 
A) transcription can proceed. 
B) translation can proceed. 
C) genetic information is not lost as the information in DNA sequences is accessed. 
D) the cell does not die when it divides.

Question 11

After transcription and before translation,eukaryotic mRNA is modified by adding

Accepted Answer

A) tRNAs and amino acids. 
B) amino acids and a poly-A tail. 
C) a cap of modified nucleotides and a poly-A tail. 
D) an AUG at one end and a poly-U tail at the other. 
A) tRNAs and amino acids. 
B) amino acids and a poly-A tail. 
C) a cap of modified nucleotides and a poly-A tail. 
D) an AUG at one end and a poly-U tail at the other.

Question 12

_____ bonds form between amino acids during elongation.

Accepted Answer

A) Disulfide 
B) Peptide 
C) Hydrogen 
D) Glycine 
A) Disulfide 
B) Peptide 
C) Hydrogen 
D) Glycine

Question 13

An mRNA molecule is also called a(n)

Accepted Answer

A) intron. 
B) transcript. 
C) gene. 
D) proscript. 
A) intron. 
B) transcript. 
C) gene. 
D) proscript.

Question 14

A genetic code word is called a(n)

Accepted Answer

A) proton. 
B) codon. 
C) nodoC. 
D) amino aciD. 
A) proton. 
B) codon. 
C) nodoC. 
D) amino aciD.

Question 15

A prion is a(n)

Accepted Answer

A) very small virus. 
B) a virus built only of protein. 
C) a glycoprotein that has multiple conformations and may be infectious. 
D) a subatomic particle,along with a neutron and an electron. 
A) very small virus. 
B) a virus built only of protein. 
C) a glycoprotein that has multiple conformations and may be infectious. 
D) a subatomic particle,along with a neutron and an electron.

Question 16

In transcription,one DNA strand is transcribed into a(n)_____ RNA strand,which is translated into protein.

Accepted Answer

A) ribosomal 
B) transfer 
C) messenger 
D) anticodon 
A) ribosomal 
B) transfer 
C) messenger 
D) anticodon

Question 17

A mutation that adds one or two bases to a gene disrupts the

Accepted Answer

A) replicating frame. 
B) intron index. 
C) genetic code. 
D) reading frame. 
A) replicating frame. 
B) intron index. 
C) genetic code. 
D) reading frame.

Question 18

The nitrogenous base that is in RNA but not in DNA is

Accepted Answer

A) thymine. 
B) thiamine. 
C) uracil. 
D) urea. 
A) thymine. 
B) thiamine. 
C) uracil. 
D) urea.

Question 19

A benefit of alternate splicing of introns out of mRNAs is that

Accepted Answer

A) it maximizes the number of introns. 
B) it increases the number of proteins that the genome encodes. 
C) it lowers the risk of infection. 
D) it speeds transcription. 
A) it maximizes the number of introns. 
B) it increases the number of proteins that the genome encodes. 
C) it lowers the risk of infection. 
D) it speeds transcription.

Question 20

During transcription

Accepted Answer

A) protein is synthesized from DNA. 
B) DNA is replicated. 
C) RNA is synthesized from DNA. 
D) protein is synthesized from amino acids. 
A) protein is synthesized from DNA. 
B) DNA is replicated. 
C) RNA is synthesized from DNA. 
D) protein is synthesized from amino acids.

Exam 10: Gene Action: From DNA to Protein

A ribozyme is

Which choice is the correct sequence from smallest to largest?

A(n)_____ carries a specific amino acid to a ribosome,where the amino acid bonds to another.

The scientists who identified a set of coordinately regulated genes,called an operon,responsible for lactose metabolism in E.coli were

Which codon halts ribosomes?

A codon consists of three consecutive

_____ "tag" misfolded proteins so that they can be refolded or sent to proteasomes.

There are _____ different sequences of codons possible in the genetic code.

Transcription and replication are alike in that both

DNA replication is necessary so that

After transcription and before translation,eukaryotic mRNA is modified by adding

_____ bonds form between amino acids during elongation.

An mRNA molecule is also called a(n)

A genetic code word is called a(n)

A prion is a(n)

In transcription,one DNA strand is transcribed into a(n)_____ RNA strand,which is translated into protein.

A mutation that adds one or two bases to a gene disrupts the

The nitrogenous base that is in RNA but not in DNA is

A benefit of alternate splicing of introns out of mRNAs is that

During transcription

What Is in a Human Genome

Cells

Meiosis,Development and Aging

Single-Gene Inheritance

Beyond Mendels Laws

Matters of Sex

Multifactorial Traits

Genetics of Behavior

DNA Structure and Replication

Gene Expression and Epigenetics

Gene Mutation

Chromosomes

Constant Allele Frequencies

Changing Allele Frequencies

Human Ancestry and Evolution

Genetics of Immunity

Cancer Genetics and Genomics

Genetic Technologies: Patenting, modifying, and Monitoring Dna

Genetic Testing and Treatment

Reproductive Technologies

Genomics

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