Question 1

While proteins are made up of amino acids connected by amide bonds,nucleic acids are made up of nucleotides connected by __________.

Accepted Answer

phosphate

Question 2

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

Accepted Answer

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

Question 3

The backbone of DNA is made up of __________.

Accepted Answer

sugars and

Question 4

The codon is part of

Accepted Answer

A)  mRNA 
B)  rRNA 
C)  tRNA 
D)  DNA 
E)  None of these 
A)  mRNA 
B)  rRNA 
C)  tRNA 
D)  DNA 
E)  None of these

Question 5

Where is the sequence of bases termed an "anticodon" found?

Accepted Answer

A)  mRNA 
B)  tRNA 
C)  rRNA 
D)  DNA 
E)  Polysomes 
A)  mRNA 
B)  tRNA 
C)  rRNA 
D)  DNA 
E)  Polysomes

Question 6

Separation of the fragments produced in the chemical sequencing of a DNA segment is achieved by the use of which of these techniques?

Accepted Answer

A)  Column chromatography 
B)  Fractional distillation 
C)  Thin layer chromatography 
D)  Gas chromatography 
E)  Gel electrophoresis 
A)  Column chromatography 
B)  Fractional distillation 
C)  Thin layer chromatography 
D)  Gas chromatography 
E)  Gel electrophoresis

Question 7

Which is the predominant tautomeric form of cytosine when it is present in DNA?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  None of these 
E)  I,II and III are present in approximately equal amounts. 
A)  I 
B)  II 
C)  III 
D)  None of these 
E)  I,II and III are present in approximately equal amounts.

Question 8

Each section of DNA that codes for a particular protein is called a _______.

Accepted Answer

The answer of Each section of DNA that codes for...

Question 9

Consideration of tautomerism in guanine suggests that it can exist in lactam and lactim forms.The form that is typically found in DNA is __________,typically pairs with _____________,while the other form is likely to pair with __________,leading to the possible spontaneous mutations.

Accepted Answer

A)  Lactam,cytosine,thymine 
B)  Lactam,cytosine,adenine 
C)  Lactim,cytosine,thymine 
D)  Lactam,uracil,cytosine 
E)  Lactim,cytosine,uracil 
A)  Lactam,cytosine,thymine 
B)  Lactam,cytosine,adenine 
C)  Lactim,cytosine,thymine 
D)  Lactam,uracil,cytosine 
E)  Lactim,cytosine,uracil

Question 10

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

Accepted Answer

CUU-AUG-GC

Question 11

The molecular archive of instructions for protein synthesis is called ______.The molecules that transcribe and translate these instructions are called ______.

Accepted Answer

The answer of The molecular archive of instructions for protein...

Question 12

The formation of a new DNA molecule which is an exact copy of a pre-existing one is designated by what term?

Accepted Answer

A)  Duplication 
B)  Transcription 
C)  Translation 
D)  Replication 
E)  Reproduction 
A)  Duplication 
B)  Transcription 
C)  Translation 
D)  Replication 
E)  Reproduction

Question 13

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 14

What is the base sequence in the original DNA strand on which the mRNA sequence: CUU-AUG-GCU-UGG-CCC-UAA was made?

Accepted Answer

mRNA CUU-AUG-GCU-UGG

Question 15

A purine:

Accepted Answer

A)  contains four nitrogens in the ring system. 
B)  is bicyclic. 
C)  can participate in hydrogen bonding. 
D)  is a heterocyclic base. 
E)  All of the above 
A)  contains four nitrogens in the ring system. 
B)  is bicyclic. 
C)  can participate in hydrogen bonding. 
D)  is a heterocyclic base. 
E)  All of the above

Question 16

The time required to synthesize a protein depends on the number of amino acid residues it contains.A rough estimate is that each ribosome can cause _________ peptide bonds to be formed per minute.

Accepted Answer

A)  30 
B)  50 
C)  100 
D)  150 
E)  200 
A)  30 
B)  50 
C)  100 
D)  150 
E)  200

Question 17

Supply the missing reagent in the following synthesis.

Accepted Answer

A)  (CH3)2C=O 
B)  HOCH2CH2OH 
C)  CH3CHOHCH3 
D)  CH3CCl2CH3 
E)  CH3CHClCH3 
A)  (CH3)2C=O 
B)  HOCH2CH2OH 
C)  CH3CHOHCH3 
D)  CH3CCl2CH3 
E)  CH3CHClCH3

Question 18

Which is an incorrect statement concerning the DNA double helix?

Accepted Answer

A)  The sugar-phosphate backbone is on the outside of the helix and the base pairs are on the inside. 
B)  The two strands are identical but proceed in opposite directions. 
C)  Hydrogen bonding holds together the two strands. 
D)  Only purine-pyrimidine base pairs can be accommodated. 
E)  The sugar-phosphate backbone is completely regular. 
A)  The sugar-phosphate backbone is on the outside of the helix and the base pairs are on the inside. 
B)  The two strands are identical but proceed in opposite directions. 
C)  Hydrogen bonding holds together the two strands. 
D)  Only purine-pyrimidine base pairs can be accommodated. 
E)  The sugar-phosphate backbone is completely regular.

Question 19

Explain why 3 bases (triplet code)are needed in the genetic code to unambiguously identify each amino acid.

Accepted Answer

There are only four bases and 20 amino a

Question 20

In DNA sequencing,what is used to convert DNA molecules into smaller,more manageable fragments?

Accepted Answer

A)  DNA polymerase 
B)  Dilute HCl 
C)  Trypsin 
D)  Chymotrypsin 
E)  Restriction endonucleases 
A)  DNA polymerase 
B)  Dilute HCl 
C)  Trypsin 
D)  Chymotrypsin 
E)  Restriction endonucleases

Exam 25: Nucleic Acids and Protein Synthesis

While proteins are made up of amino acids connected by amide bonds,nucleic acids are made up of nucleotides connected by __________.

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

The backbone of DNA is made up of __________.

The codon is part of

Where is the sequence of bases termed an "anticodon" found?

Separation of the fragments produced in the chemical sequencing of a DNA segment is achieved by the use of which of these techniques?

Which is the predominant tautomeric form of cytosine when it is present in DNA?

Each section of DNA that codes for a particular protein is called a _______.

Consideration of tautomerism in guanine suggests that it can exist in lactam and lactim forms.The form that is typically found in DNA is __________,typically pairs with _____________,while the other form is likely to pair with __________,leading to the possible spontaneous mutations.

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

The molecular archive of instructions for protein synthesis is called ______.The molecules that transcribe and translate these instructions are called ______.

The formation of a new DNA molecule which is an exact copy of a pre-existing one is designated by what term?

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?

What is the base sequence in the original DNA strand on which the mRNA sequence: CUU-AUG-GCU-UGG-CCC-UAA was made?

A purine:

The time required to synthesize a protein depends on the number of amino acid residues it contains.A rough estimate is that each ribosome can cause _________ peptide bonds to be formed per minute.

Supply the missing reagent in the following synthesis.

Which is an incorrect statement concerning the DNA double helix?

Explain why 3 bases (triplet code)are needed in the genetic code to unambiguously identify each amino acid.

In DNA sequencing,what is used to convert DNA molecules into smaller,more manageable fragments?

Carbon Compounds and Chemical Bonds

Representative Carbon Compounds: Functional Groups, Intermolecular Forces, and Infrared Ir Spectroscopy

An Introduction to Organic Reactions: Acids and Bases

Alkanes: Nomenclature, Conformational Analysis, and an Introduction to Synthesis

Stereochemistry: Chiral Molecules

Ionic Reactions - Nucleophilic Substitution and Elimination Reactions of Alkyl Halides

Alkenes and Alkynes I: Properties and Synthesis, Elimination Reactions of Alkyl Halides

Alkenes and Alkynes Ii: Addition Reactions

Nuclear Magnetic Resonance and Mass Spectrometry: Tools for Structure Determination

Radical Reactions

Alcohols and Ethers

Alcohols From Carbonyl Compounds Oxidation-Reduction and Organometallic Compounds

Conjugated Unsaturated Systems

Aromatic Compounds

Reactions of Aromatic Compounds

Aldehydes and Ketones I Nucleophilic Addition to the Carbonyl Group

Aldehydes and Ketones Ii Aldol Reactions

Carboxylic Acids and Their Derivatives Nucleophilic Addition - Elimination at the Acyl Carbon

Synthesis and Reactions of Beta-Dicarbonyl Compounds: More Chemistry of Enolate Ions

Amines

Phenols and Aryl Halides: Nucleophilic Aromatic Substitution

Carbohydrates

Lipids

Amino Acids and Proteins

Filters

Consideration of tautomerism in guanine suggests that it can exist in lactam and lactim forms.The form that is typically found in DNA is ____,typically pairs with _,while the other form is likely to pair with ____,leading to the possible spontaneous mutations.

The molecular archive of instructions for protein synthesis is called .The molecules that transcribe and translate these instructions are called .