Question 1

The four bases that make up the DNA "ladder" are: ___.

Accepted Answer

adenine,cy

Question 2

Each section of DNA that codes for a given protein is called:

Accepted Answer

A) Proteome 
B) Gene 
C) Allele 
D) Genome 
E) Metabolome 
A) Proteome 
B) Gene 
C) Allele 
D) Genome 
E) Metabolome

Question 3

Acyclovir is a nucleoside that is highly effective in treating

Accepted Answer

A) leukemia in children 
B) certain type of herpes viruses 
C) gout 
D) skin cancer 
E) several type of tumors 
A) leukemia in children 
B) certain type of herpes viruses 
C) gout 
D) skin cancer 
E) several type of tumors

Question 4

For the following statements,answer true or false.
a)The nucleic acids are base-substituted sugar esters of phosphoric acid.
b)The two principal types of nucleic acids are ribose nucleic acids (RNA),and deoxyribose nucleic acid (DNA).
c)Both ribose and deoxyribose appear in nucleic acids as N-glycosides of five different purines.
d)The base portion of the RNA molecule may be only a pyrimidine derivative.

Accepted Answer

a.true
b.t

Question 5

The codon consists of a sequence of three

Accepted Answer

A) bases 
B) amino acids 
C) three purines 
D) pyrimidines 
E) lipids 
A) bases 
B) amino acids 
C) three purines 
D) pyrimidines 
E) lipids

Question 6

List the codon sequences for these amino acids:
a)Ala
b)Phe
c)Leu
d)Tyr

Accepted Answer

a)GCA,GCC,GCG,GCU
b)

Question 7

If the base sequence along a segment of DNA were G-C-C-A-T,what would be the base sequence of messenger RNA synthesized from this sequence?

Accepted Answer

A) G-C-C-A-T 
B) C-G-G-T-A 
C) C-G-G-U-A 
D) G-C-C-A-U 
E) A-T-T-G-C 
A) G-C-C-A-T 
B) C-G-G-T-A 
C) C-G-G-U-A 
D) G-C-C-A-U 
E) A-T-T-G-C

Question 8

Draw structures to represent the hydrogen bonding between adenine and uracil.

Accepted Answer

The answer of Draw structures to represent the hydrogen bonding...

Question 9

Which are the products of hydrolysis of a certain RNA nucleotide?

Accepted Answer

A) d-Ribose,adenine 
B) d-Ribose,guanine,phosphate 
C) d-Ribose,thymine,phosphate 
D) 2-Deoxy-d-ribose,cytosine,phosphate 
E) 2-Deoxy-d-ribose,adenine 
A) d-Ribose,adenine 
B) d-Ribose,guanine,phosphate 
C) d-Ribose,thymine,phosphate 
D) 2-Deoxy-d-ribose,cytosine,phosphate 
E) 2-Deoxy-d-ribose,adenine

Question 10

In RNA,adenine can be linked to

Accepted Answer

A) deoxyribose via $\beta$-N-glycosidic bonds 
B) uracil via hydrogen bonds 
C) phosphate via phosphodiester bonds 
D) guanine via amide bonds 
E) All of the above 
A) deoxyribose via $\beta$-N-glycosidic bonds 
B) uracil via hydrogen bonds 
C) phosphate via phosphodiester bonds 
D) guanine via amide bonds 
E) All of the above

Question 11

In DNA,adenine can be linked to ___.

Accepted Answer

A) Deoxyribose via $\beta$-N-glycosidic bonds 
B) Uracil via hydrogen bonds 
C) Phosphate via phosphodiester bonds 
D) Guanine via amide bonds 
E) All of these choices. 
A) Deoxyribose via $\beta$-N-glycosidic bonds 
B) Uracil via hydrogen bonds 
C) Phosphate via phosphodiester bonds 
D) Guanine via amide bonds 
E) All of these choices.

Question 12

What amino acids sequence is coded for by the following mRNA base sequence?
CUU-AUG-GCU-UGG-CCC-UAA

Accepted Answer

Leu-Met-Al

Question 13

The monomeric units of nucleic acids are which of these?

Accepted Answer

A) d-Ribose or 2-deoxy-d-ribose 
B) Phosphate ions 
C) Purines 
D) Nucleosides 
E) Nucleotides 
A) d-Ribose or 2-deoxy-d-ribose 
B) Phosphate ions 
C) Purines 
D) Nucleosides 
E) Nucleotides

Question 14

Concerning the genetic code,which of the following is an incorrect statement?

Accepted Answer

A) Not all codons specify amino acids. 
B) There are a total of 64 different triplets. 
C) For each amino acid there are the same number of codons. 
D) The triplet codons are incorporated in messenger RNA. 
E) The triplet AUG is a "start" codon. 
A) Not all codons specify amino acids. 
B) There are a total of 64 different triplets. 
C) For each amino acid there are the same number of codons. 
D) The triplet codons are incorporated in messenger RNA. 
E) The triplet AUG is a "start" codon.

Question 15

Relatively short synthetic strands of DNA complementary to certain portions of a gene are known as:

Accepted Answer

A) antisense oligonucleotides. 
B) templates. 
C) palindromes. 
D) endonucleases. 
E) polymerases. 
A) antisense oligonucleotides. 
B) templates. 
C) palindromes. 
D) endonucleases. 
E) polymerases.

Question 16

What is the transfer RNA anticodon for the messenger RNA codon,G-C-A?

Accepted Answer

A) T-A-T 
B) G-U-T 
C) G-C-A 
D) U-C-G 
E) C-G-U 
A) T-A-T 
B) G-U-T 
C) G-C-A 
D) U-C-G 
E) C-G-U

Question 17

The DNA and RNA molecules carry genetic information in cells.What is their specific function?

Accepted Answer

A) DNA is the most important molecule as it directs the synthesis of proteins by transcribing and translating the information from RNA. 
B) DNA translates the information for protein synthesis; RNA archives and transcribes information from the DNA for protein synthesis. 
C) DNA archives information for protein synthesis; RNA transcribes and translates information from the DNA for protein synthesis. 
D) DNA and RNA are in charge of both transcribing and translating information for the synthesis of proteins from the nucleus. 
E) RNA archives information for protein synthesis,transcribes and translates it with help of molecules synthesized from DNA. 
A) DNA is the most important molecule as it directs the synthesis of proteins by transcribing and translating the information from RNA. 
B) DNA translates the information for protein synthesis; RNA archives and transcribes information from the DNA for protein synthesis. 
C) DNA archives information for protein synthesis; RNA transcribes and translates information from the DNA for protein synthesis. 
D) DNA and RNA are in charge of both transcribing and translating information for the synthesis of proteins from the nucleus. 
E) RNA archives information for protein synthesis,transcribes and translates it with help of molecules synthesized from DNA.

Question 18

A nucleotide unit is composed of:

Accepted Answer

A) a five carbon monosaccharide. 
B) a phosphate group. 
C) a heterocyclic base. 
D) an amino acid. 
E) More than one of these choices. 
A) a five carbon monosaccharide. 
B) a phosphate group. 
C) a heterocyclic base. 
D) an amino acid. 
E) More than one of these choices.

Question 19

The suggested mechanism of catalysis for the peptide bond formation during protein synthesis involves

Accepted Answer

A) a guanine group that produces acid-base catalysis in the attack of the amino group of one amino acid to the carboxylic acid function of the other. 
B) an acid-base catalysis effected by a glutamic acid in the RNA during the nucleophilic attack of the amino group on the acyl carbon of the peptide. 
C) A tetrahedral intermediate formed by the attack of a base from the tRNA on the $\alpha$-amino group of the incoming amino acid. 
D) a total or partial removal of a proton on the $\alpha$-amino group of an amino acid facilitating the attack on the acyl carbon of the growing peptide on the tRNA. 
E) a nucleophilic attack of an adenine on the $\alpha$-amino group of the incoming amino acid. 
A) a guanine group that produces acid-base catalysis in the attack of the amino group of one amino acid to the carboxylic acid function of the other. 
B) an acid-base catalysis effected by a glutamic acid in the RNA during the nucleophilic attack of the amino group on the acyl carbon of the peptide. 
C) A tetrahedral intermediate formed by the attack of a base from the tRNA on the $\alpha$-amino group of the incoming amino acid. 
D) a total or partial removal of a proton on the $\alpha$-amino group of an amino acid facilitating the attack on the acyl carbon of the growing peptide on the tRNA. 
E) a nucleophilic attack of an adenine on the $\alpha$-amino group of the incoming amino acid.

Question 20

2'-Deoxythymine exists in the lactam form rather than in the tautomeric lactim form.Explain.

Accepted Answer

@#IMG-DLM& The lacta

Exam 25: Nucleic Acids and Protein Synthesis

The four bases that make up the DNA "ladder" are: ___.

Each section of DNA that codes for a given protein is called:

Acyclovir is a nucleoside that is highly effective in treating

The codon consists of a sequence of three

List the codon sequences for these amino acids: a)Ala b)Phe c)Leu d)Tyr

If the base sequence along a segment of DNA were G-C-C-A-T,what would be the base sequence of messenger RNA synthesized from this sequence?

Draw structures to represent the hydrogen bonding between adenine and uracil.

Which are the products of hydrolysis of a certain RNA nucleotide?

In RNA,adenine can be linked to

In DNA,adenine can be linked to ___.

What amino acids sequence is coded for by the following mRNA base sequence? CUU-AUG-GCU-UGG-CCC-UAA

The monomeric units of nucleic acids are which of these?

Concerning the genetic code,which of the following is an incorrect statement?

Relatively short synthetic strands of DNA complementary to certain portions of a gene are known as:

What is the transfer RNA anticodon for the messenger RNA codon,G-C-A?

The DNA and RNA molecules carry genetic information in cells.What is their specific function?

A nucleotide unit is composed of:

The suggested mechanism of catalysis for the peptide bond formation during protein synthesis involves

2'-Deoxythymine exists in the lactam form rather than in the tautomeric lactim form.Explain.

The Basics

Families of Carbon

Acids and Bases

Nomenclature and Conformations of Alkanes and Cycloalkanes

Stereochemistry

Nucleophilic Reactions

Alkenes and Alkynes I

Alkenes and Alkynes II

Nuclear Magnetic Resonance and Mass Spectrometry

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Reactions at the Α Carbon of Carbonyl Compounds

Condensation and Conjugate Addition Reactions of Carbonyl Compounds

Amines

Transition Metal Complexes

Carbohydrates

Lipids

Amino Acids and Proteins

Filters