Structure of DNA

Structure of DNA

Assessment

Interactive Video

Biology

10th - 12th Grade

Practice Problem

Easy

Created by

Wayground Content

Used 29+ times

FREE Resource

The video tutorial explores the discovery and structure of nucleic acids, focusing on DNA and RNA. It begins with the historical identification of nuclein and the introduction of nucleic acids by Richard Altman. The tutorial explains the components of nucleotides, including nitrogenous bases, sugars, and phosphoric acid, and distinguishes between DNA and RNA. It covers the types of bases, purines and pyrimidines, and their pairing rules. The video also discusses the formation of polynucleotides, Chargaff's rules, and the DNA double helix model proposed by Watson and Crick. Finally, it describes the different forms of DNA, such as B, A, and Z DNA, and their structural characteristics.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who introduced the term 'nucleic acid'?

Maurice Wilkins

Richard Altman

Rosalind Franklin

Erwin Chargaff

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main difference between the sugars in DNA and RNA?

DNA has ribose sugar, RNA has deoxyribose sugar

DNA has deoxyribose sugar, RNA has ribose sugar

Both have ribose sugar

Both have deoxyribose sugar

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a purine base?

Adenine

Uracil

Cytosine

Thymine

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of bond connects adjacent nucleotides in a polynucleotide chain?

Phosphodiester bond

Covalent bond

Ionic bond

Hydrogen bond

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to Chargaff's rules, which of the following is true?

Adenine equals thymine

Adenine equals guanine

Thymine equals guanine

Cytosine equals adenine

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the handedness of the B form of DNA?

Right-handed

Left-handed

None of the above

Ambidextrous

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which form of DNA is favored at low water concentrations?

A form

Z form

None of the above

B form

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