
DNA Structure and Replication
Authored by Todd Carmichael
Biology
7th - 12th Grade
34 Questions
NGSS covered
Used 21+ times

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which sequence of DNA bases would pair with this partial strand:
CAT TCA CTG
ATG TGA CAG
TAC ACT GTC
GTA AGT GAC
CAT TCA CTG
Answer explanation
The DNA base pairing follows the rule A-T and C-G. The given strand CAT TCA CTG pairs with GTA AGT GAC, where C pairs with G, A with T, and T with A, confirming it as the correct complementary sequence.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
DNA replication results in two DNA molecules,
each with two original strands
each with two new strands
each with one new strand and one original strand
one with two new strands and the other with two original strands
Answer explanation
During DNA replication, each new DNA molecule consists of one original strand and one newly synthesized strand, a process known as semi-conservative replication. Thus, the correct answer is that each molecule has one new strand and one original strand.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Order of DNA replication:
3, 4, 2, 1
3, 1, 4, 2
2, 1, 4, 3
3, 4, 1, 2
Answer explanation
The correct order of replication is 3, 4, 1, 2. This sequence accurately reflects the steps involved in the replication process, ensuring clarity and correctness in the biological context.
Tags
NGSS.HS-LS3-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A process in which DNA has the unique ability to make an exact copy of itself.
Replication
Translation
Transcription
Answer explanation
Replication is the process by which DNA makes an exact copy of itself, ensuring genetic information is passed on during cell division. Translation and transcription are related to protein synthesis and RNA production, respectively.
Tags
NGSS.HS-LS3-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The process of DNA replication is called semi-conservative because it results in:
None of these
Two DNA molecules: one original molecule and one with two new strands
Two exact copies with new strands
Two identical molecules, each with one original strand and one new strand.
Answer explanation
DNA replication is termed semi-conservative because each of the two resulting DNA molecules contains one original strand and one newly synthesized strand, ensuring genetic fidelity.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is DNA replication called when the new DNA consists of one parent strand and one new strand?
Conservative
Semiconservative
Dispersive
Answer explanation
DNA replication is termed semiconservative because each new DNA molecule consists of one original (parent) strand and one newly synthesized strand, ensuring that genetic information is accurately preserved.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the backbone of DNA composed of?
Nitrogen bases
Amino acids
Double H
Sugar & phosphate
Answer explanation
The backbone of DNA is composed of sugar and phosphate molecules. These form the structural framework, while nitrogen bases attach to the sugar, but they are not part of the backbone itself.
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