DNA Structure and Function Concepts

DNA Structure and Function Concepts

Assessment

Interactive Video

Biology

10th - 12th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explores the discovery of DNA's structure by four scientists in the 1950s. It explains the double helix model, highlighting the anti-parallel nature of nucleic acid strands and the sugar-phosphate backbone. The tutorial details the arrangement of nitrogenous bases, their perpendicular orientation, and the significance of base pair stacking. It also discusses the forces stabilizing the DNA structure, including hydrogen bonds, Vander Waals forces, and the hydrophobic effect, contributing to the overall stability of the DNA molecule.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who were the four scientists involved in discovering the structure of DNA?

Albert Einstein, Niels Bohr, James Watson, Francis Crick

Isaac Newton, Charles Darwin, James Watson, Francis Crick

Marie Curie, Louis Pasteur, James Watson, Francis Crick

Maurice Wilkins, Rosalind Franklin, James Watson, Francis Crick

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do the two polynucleotide chains in DNA run in relation to each other?

Perpendicular to each other

Parallel but in opposite directions

Parallel and in the same direction

Randomly oriented

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the composition of the DNA backbone?

Lipids

Nitrogenous bases

Amino acids

Sugar-phosphate groups

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where are the nitrogenous bases located in the DNA structure?

On the exterior of the DNA molecule

On the interior of the DNA molecule

Randomly distributed

Only at the ends of the DNA molecule

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the distance between two base pairs in the DNA helix?

10.0 angstroms

5.0 angstroms

3.4 angstroms

2.0 angstroms

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many bases are there in a single turn of the DNA helix?

12 bases

8 bases

5 bases

10 bases

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the diameter of the DNA molecule?

10 angstroms

20 angstroms

30 angstroms

40 angstroms

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