Portage Learning Chem 210 Module 6 exam GRADED A+ CHEM210

Question 1
pts

In RNA, guanine always pairs with ________.

Thymine
Guanine
Cytosine
Uracil
Both A and B
CYSTOSINE
Question 2
pts

DNA is built from which of the following?

Nucleosides
Genes
Purines
Nucleotide
Codons
NUCLEOTIDE
Question 3
pts

The Z-form helix of DNA is stabilized mainly by __________.

Ionic bonds
Covalent bonds
Hydrogen bonds
Ion-dipole bonds
Hydrogen covalent bonds
HYDROGEN BONDS



Question 4
pts

,Which of the following pentose sugars is a constituent of mRNA?




Ribose
Xylose
Ribitol
2-deoxyribose
Arabinose
RIBOSE
Question 5
pts

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




Question 6
pts


Identify the base guanine from among the following structures.

, A.




B.




C.