What is the significance of the sequence (order) of the Nitrogen Bases in DNA?

The order of the Nitrogen Bases determines the traits that an organism will have.

The order of the Nitrogen Bases determines the number of chromosomes present in an organism.

The order of the Nitrogen Bases determines the gender of an organism.

The order of the Nitrogen Bases determines whether an organism is abiotic biotic.

What is meant by the phrase "DNA is universal"?

All organisms possess DNA made up of the same components.

All organisms share the exact same DNA

DNA can be found throughout the universe

DNA is found in Prokaryotes, Eukaryotes, and Viruses

Which of the following describes DNA molecules after replication has taken place?

Two strands- each with one original and one new strand

One strand with two new original strands and one molecule with two new strands

Two strands-each with two new strands

Two strands-each with two old strands

Which molecule forms the middle (rungs) of the DNA ladder?

Deoxyribose and a hydrogen bond

Why does DNA need to be replicated before the cell divides?

So that every new cell has a complete set of chromosomes (DNA)

So that every cell has a back-up in case it becomes damaged

Because each copy is not perfect and it increases genetic diversity

Because the nucleotides are unstable and continuously split apart

Which of the following describes the steps of DNA replication in proper order?

Enzymes break the hydrogen bonds between the four nitrogen chemical bases. --> The double helix begins to ‘unzip’ --> Addition of free-nucleotides to the matching half of the chain occurs --> There are two new DNA molecules, each one a copy of the original

Enzymes break the hydrogen bonds between the four nitrogen chemical bases --> There are two new DNA molecules, each one a copy of the original --> Addition of free-nucleotides to the matching half of the chain occurs

he double helix begins to ‘unzip’. --> Enzymes break the hydrogen bonds between the four nitrogen chemical bases. --> There are two new DNA molecules, each one a copy of the original. --> Addition of free-nucleotides to the matching half of the chain occurs

There are two new DNA molecules, each one a copy of the original. --> Addition of free-nucleotides to the matching half of the chain occurs --> The double helix begins to ‘unzip’

A student used poster board to construct this model of a section of DNA. What statement describes this model of DNA?

The model is inaccurate because the base pairs are incorrect

The model is accurate because it contains correctly paired bases

The model is accurate because it shows each base splitting to form a double helix

The model is inaccurate because some typical bases in DNA are missing

Whether it is a prokaryotic bacterium or a eukaryotic plant or animal, their "DNA is universal" - what does that phrase mean?

All organisms possess DNA made up of the same components

DNA can be found throughout the universe

All organisms share the exact same DNA

DNA is found in Prokaryotes, Eukaryotes, and Viruses

There are specific types of bases, called nucleotides, which comprise a DNA molecule. The number of Adenine bases in a DNA molecule equals the number of Thymine bases . Which statement best explains why this occurs?

An adenine base on one strand of DNA bonds to a thymine base on the other strand

A thymine base always follows an adenine base on a single strand of DNA

DNA is made of alternating adenine and thymine bases

DNA contains equals numbers of all base types

VCS Biology_ Unit 5_DNA Structure/Function & Replication

Quiz

•

Biology

•

9th - 12th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-LS1-1, HS-LS1-4, HS-LS3-1

Standards-aligned

Robin Musson

Used 64+ times

FREE Resource

Student preview

30 questions

Show all answers

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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.

We eat it every day for energy.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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

ribose (sugar) and nitrogen bases

ribose (sugar) and phosphate

deoxyribose (sugar) and nitrogen bases

deoxyribose (sugar) and phosphate

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which organelle is DNA found in?

Mitochondria

Cell membrane

Chloroplast

Nucleus

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which shows the correct complementary base pairing rules for DNA?

C-A, T-G

A-G, C-T

C-G, U-A

T-A, G-C

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What determines the code, or information, of a DNA molecule?

The shape (structure) of the nitrogen bases

The order (sequence) of the nitrogen bases

The color of the nitrogen bases

The frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What does DNA code for the production of?

Nitrogen bases

Proteins

Amino acids

Phosphates

Tags

NGSS.HS-LS1-1

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VCS Biology_ Unit 5_DNA Structure/Function & Replication