Nucleic Acids and Their Components

Nucleic Acids and Their Components

Assessment

Interactive Video

Biology, Science

9th - 12th Grade

Hard

Created by

Lucas Foster

FREE Resource

The video tutorial explains the differences between nucleosides and nucleotides, highlighting that nucleosides consist of a ribose sugar and a nitrogenous base, while nucleotides also include a phosphate group. It further distinguishes between purines (adenine and guanine) and pyrimidines (thymine, cytosine, and uracil), noting their structural differences. The video also covers the base composition of DNA and RNA, emphasizing that DNA contains thymine while RNA contains uracil. Structural details of purines and pyrimidines, including resonance and aromaticity, are discussed to illustrate their stability.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the components of a nucleoside?

Five-carbon ribose sugar and phosphate group

Five-carbon ribose sugar and nitrogenous base

Phosphate group and nitrogenous base

Nitrogenous base and phosphate group

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a nitrogenous base?

Guanine

Thymine

Adenine

Glucose

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What distinguishes purines from pyrimidines?

Purines have one ring, pyrimidines have two

Purines have two rings, pyrimidines have one

Purines are found only in DNA

Pyrimidines are found only in RNA

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which base is found in RNA but not in DNA?

Cytosine

Adenine

Uracil

Thymine

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a key structural difference between adenine and guanine?

Adenine has a carbonyl group, guanine does not

Guanine has a carbonyl group, adenine does not

Both have carbonyl groups

Neither has a carbonyl group

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of ring structure do pyrimidines have?

Triple ring

Quadruple ring

Double ring

Single ring

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which pyrimidine base contains a methyl group?

Cytosine

Thymine

Uracil

Adenine

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