NVCC BIO 101 Exam 3 / 2025 Verified Biology Exam Questions and
Answers | Comprehensive A+ Study Resource Currently Testing |
Northern Virginia Community College
What are the 3 characteristics of DNA?- CORRECT ANSWER โโ 1. Must be able to code for the sequence of
amino acids in proteins and control protein synthesis
2. Must be able to replicate itself prior to cell division
3. Must be able to change over time to account for evolutionary change (evolution)
Is this statement correct? Two kinds of molecules participate in protein synthesis: deoxyribonucleic acid (DNA)
and ribonucleic acid (RNA).- CORRECT ANSWER โโ True
Is this statement correct? The purines, cytosine, thymine, and uracil, have a single-ring structure.- CORRECT
ANSWER โโ False: They are not Purines
Is this statement correct? Deoxyribonucleic (DNA) acid has one less hydroxyl group than ribonucleic acid
(RNA)- CORRECT ANSWER โโ True
Is this statement correct? Each strand of DNA is oriented such that the 3' carbons of deoxyribose in one strand
are oriented in the opposite directions from the 3' carbons in the other strand, thus, the two strands of DNA have
opposite orientations and the DNA molecule is said to be antiparallel.- CORRECT ANSWER โโ True
Is this statement correct? In a DNA molecule, adenine always bonds to thymine, and cytosine always bonds
with guanine- CORRECT ANSWER โโ True
Is this statement correct? Thymine is not present in a DNA molecule.- CORRECT ANSWER โโ False: It's
present ONLY in DNA
Is this statement correct? There is a triple bond between cytosine and guanine and a double bond between
adenine and thymine. Both bonds are hydrogen bonds and, coupled with hydrophobic forces, help the DNA
molecule remain together.- CORRECT ANSWER โโ True
