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3 / 3 pts
In RNA, guanine always pairs with.
Thymine Guanine Cytosine Uracil Both A and B CYSTOSINE
DNA is built from which of the following?
Nucleosides Genes Purines Nucleotide Codons NUCLEOTIDE
The Z-form helix of DNA is stabilized mainly by.
Ionic bonds Covalent bonds Hydrogen bonds Ion-dipole bonds Hydrogen covalent bonds HYDROGEN BONDS
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3 / 3 pts
Which of the following pentose sugars is a constituent of mRNA?
Ribose Xylose Ribitol 2-deoxyribose Arabinose RIBOSE
Purines have ring(s), (each) containing nitrogen(s), whereas pyrimidines have ring(s), (each) containing nitrogen(s).
1; 1; 1; 1 1; 2; 1; 2 2; 1; 1; 2 2; 2; 1; 1 2; 2; 1; 2 2; 2; 1; 2
Identify the base guanine from among the following structures.
3 / 3 pts
D
Which of the following nucleic acids is responsible for using the encoded geneticinformation to produce proteins found in living organisms?
Peptide nucleic acid Ribonucleic acid Ribitol nucleic acid Deoxyribonucleic acid Glycerol nucleic acid RIBONUCLEIC ACID
3 / 3 pts
3 / 3 pts
Identify the complementary bases from the following.
Adenine-Cytosine Adenine- Thymine Guanine-Thymine Guanine-Adenine Cytosine-Uracil ADENINE-THYMINE
How many hydrogen bonds are made between T and its complementary nucleotide?
2 3 4 5 6 2
3 / 3 pts
3 / 3 pts
A-form X-Form C-form L-form Z-form A-FORM
Which of the following is a second messenger in cells?
FAD cAMP AMP dATP UTP cAMP
functions as a protein coenzyme.
ATP AMP FAD cAMP GGG FAD
rRNA makes up about percent of ribosomes.
0 / 3 pts
3 / 3 pts
65
The conclusion that G and C are present in DNA in equimolar amounts is credited to .
James Watson Francis Crick Erwin Chargaff Both A and B None of the above ERWIN CHARGAFF
The primary sequence of DNA is written.
N to C C to N 5 ’ to 3’ 3 ’ to 5’ Both A and D 5 ’ to 3’
In the Watson-Crick model for the double helix, which statement is NOT true?The two
strands run parallel to one another
3/ 3 pts
GTP
Which of the following is a nucleoside?
3 / 3 pts
E. Both A and C
E.BOTH A AND C
Which of the following is heterocyclic?
3 / 3 pts
3 / 3 pts
D. Both B and C
E. None of the above
C
A major component of RNA but not DNA is:
AMP GMP UMP CMP TMP UMP
On the following molecule, which letter (A, B, C, D, or E) indicates the 5’ end?
5 / 5 pts
(Short answer) Scientists say that two DNA strands are complementary. Briefly describewhat is meant by complementary. Show one example in your response.
The nucleotide sequences of complementary strands are such that, whenever an A occurs in one strand, there is a T in the other strand withwhich it can form a hydrogen-bonded base pair. Whenever a C occurs inone strand, a G occurs in the other. A is the base that is complementaryto T, and C is the base complementary to G.
A) Nucleotides
B) adenine and guanine
C) Uracil
E) 2-deoxyribose
5 / 5 pts
(Short answer) The monomers of RNA nucleic acids, called nucleotides, consistof three parts. What are those three parts? (Give three)
Your Answer:
phosphoric acid, ribose (a pentose sugar) and an organic base.
