2.1.3 Nucleotides and nucleic acids (a-c) SYI

2.1.3 Nucleotides and nucleic acids (a-c) SYI

12th Grade

32 Qs

quiz-placeholder

Similar activities

DNA Vs. RNA

DNA Vs. RNA

12th Grade

32 Qs

DNA History, Structure, and Replication

DNA History, Structure, and Replication

9th - 12th Grade

30 Qs

Molecular Genetics Pre-Test

Molecular Genetics Pre-Test

10th - 12th Grade

27 Qs

Nucleic Acids IB Bio 2.6.U1 2.6.S1 2.6.U3 2.6.U2

Nucleic Acids IB Bio 2.6.U1 2.6.S1 2.6.U3 2.6.U2

9th - 12th Grade

28 Qs

 AP Bio Insta-Review Topic 1.5*: Structure & Function of Macromo

AP Bio Insta-Review Topic 1.5*: Structure & Function of Macromo

9th - 12th Grade

27 Qs

Biology Honors - Chapter 11: Structure and Function of DNA

Biology Honors - Chapter 11: Structure and Function of DNA

9th - 12th Grade

36 Qs

Unit 5: DNA, RNA, Protein Synthesis

Unit 5: DNA, RNA, Protein Synthesis

11th - 12th Grade

27 Qs

DNA Structure Quiz

DNA Structure Quiz

9th - 12th Grade

30 Qs

2.1.3 Nucleotides and nucleic acids (a-c) SYI

2.1.3 Nucleotides and nucleic acids (a-c) SYI

Assessment

Quiz

Biology

12th Grade

Medium

Created by

Steven Yiu

Used 6+ times

FREE Resource

32 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What are the three components of a nucleotide?

Pentose Sugar, Nitrogenous base, Phosphate Group

Deoxyribose, Uracil, Guanine

Ribose Sugar, Adenine, Cytosine

Thymine, Purines, Phosphodiester Bond

Answer explanation

A nucleotide consists of three components: a pentose sugar, a nitrogenous base, and a phosphate group. The correct choice is 'Pentose Sugar, Nitrogenous base, Phosphate Group'. This choice includes all three components required for a nucleotide.

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which component of a nucleotide can be either ribose or deoxyribose?

Nitrogenous base

Phosphate group

Purines

Pentose sugar

Answer explanation

The pentose sugar is a component of a nucleotide that can be either ribose or deoxyribose. It is responsible for providing the backbone structure to the nucleotide. The other options, such as the nitrogenous base, phosphate group, and purines, are also important components of a nucleotide, but they do not determine the type of sugar present. Therefore, the correct choice is the pentose sugar.

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Where are nitrogenous bases attached in a nucleotide?

Second carbon of sugar

Third carbon of sugar

First carbon of sugar

Fourth carbon of sugar

Answer explanation

In a nucleotide, nitrogenous bases are attached to the first carbon of the sugar. This attachment is important for the structure and function of nucleic acids. The first carbon provides a stable connection for the nitrogenous base, allowing for the formation of the nucleotide sequence. The other options, such as the second, third, and fourth carbon of the sugar, are not involved in the attachment of nitrogenous bases. Therefore, the correct choice is the first carbon of the sugar.

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

How many types of nitrogenous bases are there in nucleotides?

1

2

3

4

Answer explanation

There are four types of nitrogenous bases in nucleotides: adenine, cytosine, guanine, and thymine. However, only two of these bases are present in DNA, which are adenine and thymine. Therefore, the correct answer is 2.

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following is a purine nitrogenous base?

Cytosine

Thymine

Adenine

Uracil

Answer explanation

Adenine is a purine nitrogenous base. It is one of the four bases found in DNA and RNA. Adenine pairs with thymine in DNA and with uracil in RNA. Cytosine and thymine are pyrimidine bases, not purine bases. Uracil is also a pyrimidine base. Therefore, the correct answer is Adenine.

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which nitrogenous base pairs with thymine (or uracil) with two hydrogen bonds?

Cytosine

Guanine

Adenine

Purines

Answer explanation

Adenine is the nitrogenous base that pairs with thymine (or uracil) with two hydrogen bonds. This is because adenine forms two hydrogen bonds with thymine (or uracil) in DNA or RNA. Cytosine pairs with guanine with three hydrogen bonds, while guanine pairs with cytosine with three hydrogen bonds. Purines are a type of nitrogenous base that includes adenine and guanine. Therefore, the correct choice is Adenine.

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

How many hydrogen bonds are formed between cytosine and guanine?

1

2

3

4

Answer explanation

Three hydrogen bonds are formed between cytosine and guanine. These hydrogen bonds occur between the nitrogenous bases of the two nucleotides. The hydrogen bonds play a crucial role in stabilizing DNA. The correct choice is 3.

Create a free account and access millions of resources

Create resources
Host any resource
Get auto-graded reports
or continue with
Microsoft
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?