Biology 4

Every living thing on earth uses DNA to store genetic information.

Group of answer choices

True

False

 

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Question 20.5 pts

What does the "A" stand for in DNA?

Group of answer choices

always

acid

arginine

amino

 

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Question 30.5 pts

If you could stretch out all of your chromosomes from one cell, how long would all the DNA be?

Group of answer choices

2 inches

2 feet

6 inches

6 feet

 

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Question 40.5 pts

DNA fits in the cells because it is tightly packed in a process called ____________________________.

*This question is in Ch. 6 in the new edition

 

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Question 50.5 pts

Two proteins involved in compressing DNA are

*This information is in ch. 6 of the new edition

Group of answer choices

guanine and cytosine

nucleosomes and histones

adenine and thymine

chromosomes and genes

 

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Question 60.5 pts

DNA molecules can only last for a few hundred years outside of a cell.  

Group of answer choices

True

False

 

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Question 70.5 pts

A nucleotide is made up of

Group of answer choices

phosphate

deoxyribose sugar

nitrogen-rich base

nucleosome

 

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Question 80.5 pts

Which of the following is not an example of a nitrogen-rich base in DNA?

Group of answer choices

adenine

guanine

deoxyribose

thymine

 

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Question 90.5 pts

__________________________ are the building blocks of DNA

 

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Question 100.5 pts

DNA normally exists as a single-stranded molecule.  

Group of answer choices

True

False

 

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Question 110.5 pts

According to Chargaff's rules, adenine complements with _______________.

Group of answer choices

guanine

cytosine

thymine

adenine

 

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Question 120.5 pts

All DNA molecules have the same four bases, just arranged in different orders.  

Group of answer choices

True

False

 

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Question 130.5 pts

This type of DNA is only found in plants

Group of answer choices

chloroplast

mitochondrial

all choices are correct

nuclear

 

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Question 140.5 pts

This type of DNA is only inherited from the mother.

Group of answer choices

chloroplast

mitochondrial

nuclear

 

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Question 150.5 pts

This type of DNA codes for the phenotype of an organism.

Group of answer choices

none of the choices are correct

chloroplast

nuclear

mitochondrial

 

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Question 160.5 pts

Gregor Mendel knew that DNA was the molecule of heredity.

Group of answer choices

True

False

 

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Question 170.5 pts

What two scientists are credited for discovering the structure of DNA?

Group of answer choices

Hershey and Chase

Franklin and Wilkins

Chargaff and Watson

Watson and Crick

Question 10.5 pts

This enzyme unwinds double-stranded DNA

Group of answer choices

primase

DNA polymerase

helicase

ligase

 

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Question 20.5 pts

DNA replication is called semiconservative because

Group of answer choices

it only replicates one strand of DNA at a time

it produces a DNA molecule which has one new strand and one old strand

it produces a molecule composed of two old strands of DNA

it produces a molecule composed of two new strands of DNA

 

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Question 30.5 pts

In DNA, complimentary base pairing occurs between

Group of answer choices

cytosine and adenine

adenine and thymine

guanine and thymine

adenine and uracil

 

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Question 40.5 pts

This enzyme joins fragments of DNA together

Group of answer choices

DNA polymerase

primase

ligase

helicase

 

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Question 50.5 pts

This enzyme has proof-reading ability

Group of answer choices

DNA polymerase

helicase

primase

ligase

 

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Question 60.5 pts

This enzyme adds new nucleotides to a strand

Group of answer choices

ligase

primase

DNA polymerase

helicase

 

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Question 70.5 pts

This enzyme keeps the DNA molecule from forming knots

Group of answer choices

DNA polymerase

gyrase

telomerase

ligase

 

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Question 80.5 pts

This enzyme replicates the ends of a chromosome

Group of answer choices

telomerase

gyrase

DNA polymerase

helicase

 

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Question 90.5 pts

If a genome contains 20% adenine, what is the percentage of cytosine?

Group of answer choices

30%

60%

20%

this can not be determined

 

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Question 101 pts

If one strand of DNA is ...AGTTC... what would be newly made opposite strand be?

Group of answer choices

...GACCT...

...AGTTC...

...CAGGT

...TCAAG...

Approximately how many genes make up the human genome?

Group of answer choices

we do not know

20,000-30,000

10,000-15,000

100,000

 

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Question 20.5 pts

All of the DNA in one set of chromosomes of an organism is called the _____________________.

 

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Question 30.5 pts

Most of our genes are identical to genes from other organisms like fruit flies, chickens and roundworms. 

Group of answer choices

True

False

 

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Question 40.5 pts

The human genome is the largest known genome of any organism.

Group of answer choices

True

False

 

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Question 50.5 pts

Which of the following are benefits of the completion of the Human Genome Project (HGP)?

Group of answer choices

diagnosis of genetic disorders

all choices are correct

development of better drugs and gene therapy

understanding the causes of cancer

 

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Question 60.5 pts

Which federal law states that employers and insurance companies can not discriminate based on a person's genetic information?

Group of answer choices

We do not have such a law

CODIS

GINA

FEMA

 

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Question 70.5 pts

Using genetic information for individualized care is called ________________ medicine.