DNA Structure CFU Prep

Presentation

•

Science

•

7th Grade

•

Medium

•

NGSS

HS-LS1-1, HS-LS3-1, MS-LS3-1

Standards-aligned

Heather Ziemba

Used 32+ times

FREE Resource

7 Slides • 27 Questions

DNA Structure CFU Prep

Each nucleotide has 3 parts.

Phosphate group
Sugar (deoxyribose)
Nitrogenous Base
1. Adenine
2. Cytosine
3. Thymine
4. Guanine

DNA is a Nucleic Acid!

It is made of nucleotides.

DNA is made of 2 strands of nucleotides. Together they make a ladder shape.

THE SIDES OF THE LADDER are made up of the deoxyribose sugar and the phosphate group.
THE "RUNGS" (MIDDLE) OF THE LADDER is made up of the nitrogeneous bases.

The twisted ladder shape is called a double helix!

This shape was discovered by ROSALIND FRANKLIN, who took an X ray photo of DNA.

Multiple Choice

Which of the following best describes a DNA molecule?

double helix

contains ribose

made of amino acids

contains Uracil

Multiple Choice

Which 2 molecules form the sides (backbone) of the DNA ladder?

deoxyribose sugar and adenine

deoxyribose sugar and a hydrogen bond

deoxyribose sugar and the nucleus

deoxyribose sugar and phosphate

Multiple Choice

What are the three components of a nucleotide?

sugar, hydrogen, nitrogen base

sugar, oxygen, nitrogen base

sugar, phosphate, nitrogen base

sugar, phosphate, protein

Multiple Choice

Name this structure

double helix

nucelotide

twisted ladder

hydrogen bond

Multiple Choice

Which organelle is DNA usually found in?

cell membrane

vacuole

ribosome

nucleus

Multiple Choice

Nucleotides are made up of a sugar, phosphate, and..?

nitrogenous base

nucleic acid

cholesterol

fatty acid

Multiple Choice

Which of the following is not a component of DNA?

5 Carbon Sugar

Phosphate Group

Carbon Base

Nitrogen Base

Multiple Choice

Which of the following is not a nitrogen base found in DNA?

Thymine

Uracil

Guanine

Adenine

Multiple Choice

What are the nucleotides made of?

Sugar, Phosphate, nitrogen base

Phosphate, Adenine, nitrogen base

Thymine, Adenine, Cytomine

Phosphate, Nitrogen, Adenine

Multiple Choice

Which of the following units are repeatedly joined together to form a strand of DNA? (This is the MONOMER of DNA.)

amino acids

nucleotides

fatty acids

polysaccharides

Multiple Choice

What are the 4 nitrogen bases?

adenine, thymine, cytoplasm, and guanine

adenine, thymine cytosine, and guanine

adenine, thymine, cytosine, and gylcerol

adenine, thymine, cytosine, and glucose

Guanine--> Cytosine

Cytosine--> Guanine

The nitrogenous bases pair up in specific ways. They are connected by hydrogen bonds!

Adenine --> Thymine

Thymine --> Adenine

Multiple Choice

Nitrogenous bases are joined by which type of bond?

polar bonds

ionic bonds

covalent bonds

hydrogen bonds

Multiple Choice

Cytosine always pairs with

Adenine

Thymine

Uracil

Guanine

Multiple Choice

Guanine bonds with ______________.

Adenine

Guanine

Cytosine

Thymine

Multiple Choice

What is the complement to the DNA strand below:
5'-ATGCCAT-3'

5'-TACGGTA-3'

3'-TACGGTA-5'

3'-ATGGCAT-5'

5'-ATGGCAT-3'

Multiple Choice

Which of the following is a base pair?

Adenine - Cytosine

Cytosine - Thymine

Deoxyribose - Cytosine

Cytosine - Guanine

Multiple Choice

According to Chargaff's rule, Cytosine always pair with

Adenine

Uracil

Thymine

Guanine

Multiple Choice

Which sequence of complementary DNA bases would pair with this partial strand
ATG TGA CAG?

ATG TGA CAG

TAC ACT GTC

GTA AGT GAC

CAT TCA CTG

Multiple Choice

Which sequence of complementary DNA bases would pair with this partial strand
ATG TGA CAG?

ATG TGA CAG

TAC ACT GTC

GTA AGT GAC

CAT TCA CTG

Multiple Choice

In a molecule of double-stranded DNA, the amount of adenine present is always equal to the amount of _________.

cytosine

guanine

thymine

uracil

Multiple Choice

The two strands of nitrogenous bases in DNA are joined by which type of bond?

polar bonds

ionic bonds

covalent bonds

hydrogen bonds

This enzyme unzips and separates the two strands of DNA.

HELICASE

This enzyme adds new nucleotides to each of the separated strands of DNA.

DNA POLYMERASE

Because of how the nitrogenous bases pair, you end up with two identical copies of DNA.

THE RESULT

Multiple Choice

What is it called when DNA makes a copy of itself?

Translation

Replication

Mitosis

Gene therapy

Multiple Choice

When replication is complete, there are two _____________ DNA modules.

identical

different

similar

A living thing's genetic code is determined by the sequence of bases that are found in the center of the molecule. Sections of DNA that code for specific traits are called genes.

What's the purpose of DNA?

Multiple Choice

Why is DNA important?

it is very small and very complicated

it's in everything

it serves as the blueprint for traits of all living things

because we eat it every day for energy

Multiple Choice

Assume that you have straight hair and your sibling has curly hair. What accounts for this difference?

You have DNA and your sibling does not.

The your sequence of nitrogen bases is different than your sibling.

Your sibling has a weave.

Your sibling has a genetic mutation.

Multiple Choice

How is the instructions for your traits carried on a DNA molecule?

Sequence of the nitrogen bases

In the Deoxyribose Sugar

In the bond between the phosphate and the sugar

In the phosphate group

Multiple Choice

What is a section of DNA that codes for a specific protein called?

RNA

replication

gene

protein

DNA Structure CFU Prep

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