BIOLOGY 101 EXAM 3 |150 COMPLETE QUESTIONS WITH EXPERT SOLUTIONS| 2026 LATEST UPDATED| A+

BIOLOGY 101 EXAM 3 |150 COMPLETE QUESTIONS WITH EXPERT

SOLUTIONS| 2026 LATEST UPDATED| A+

If the DNA in a cell consists of 20% A, it will be_________ G.




20%

80%

30%

40%

10% - (answer)30%




Which of the following DNA strands is complementary to the DNA sequence 5'-ATCGTACG-3'?




- 3'-TAGCATGC-5'

- 5'-TAGCTAGC-3'

- 3'-ATGCATGC-5'

- 5'-ATGCATGC-3'

- 3'-CGTACGTA-5' - (answer)3'-TAGCATGC-5

,Which of the following RNA strands is complementary to the DNA sequence 5'-ATCGATCG-3'?




- 5'-UAGCUAGC-3'

- 3'-UAGCUAGC-5'

- 3'-AUGCAUGC-5'

- 3'-TAGCTAGC-5'

- 5'-TAGCTAGC-3' - (answer)3'-UAGCUAGC-5'




Most bacteriophages consist of only a_________ coat and a_________ core.




-lipid; protein

-polysaccharide; nucleic acid

-protein; lipid

-protein; nucleic acid

-polysaccharide; protein - (answer)-protein; nucleic acid




A single strand of DNA consists of covalently bonded building blocks called

, -amino acids.

-monosaccharides.

-phospholipids.

-sterols.

-nucleotides - (answer)-nucleotides




In DNA, the "rungs" between the two strands of DNA are formed from the




-covalent bonds between nitrogen base pairs.

-hydrogen bonds between nitrogen base pairs.

-phosphodiester bonds between the deoxyribose sugars.

-ionic bonds between the phosphate pairs.

-ionic bonds between the nitrogen base pairs - (answer)-hydrogen bonds between nitrogen base

pairs.




In a molecule of DNA, hydrogen bonds hold together the two strands, such as hydrogen bonds

that form when....




-Cytosine pairs with adenine.