lionman1
contestada

PLEASE HELP ME AND DONT GUESS
QUESTION 1

Does the following statement describe a function of DNA, a function of RNA, a function of both DNA and RNA, or a function of neither DNA nor RNA? It makes up a main part of the ribosome, where amino acids are attached to one another to make a protein.

DNA

RNA

both DNA and RNA

neither DNA nor RNA
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QUESTION 2

Which of these are the correct base pairs in DNA?

adenine and guanine
cytosine and thymine


cytosine and guanine
adenine and uracil


adenine and thymine
cytosine and guanine


adenine and uracil
thymine and cytosine

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QUESTION 3

For the following structural characteristic, decide if it is a characteristic of DNA, a characteristic of RNA, a characteristic of both DNA and RNA, or a characteristic of neither DNA nor RNA. It contains uracil as a base.

DNA

RNA

both DNA and RNA

neither DNA nor RNA
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QUESTION 4

The process of forming two DNA molecules from one is called ________.

replication

transcription

translation

expression
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QUESTION 5

What happens before the replication fork can be formed?

Base pairs are added.

The double helix is unwound.

DNA polymerase attaches.

Mutations are corrected.
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QUESTION 6

What enzyme is responsible for adding the complementary base pairs during replication?

DNA polymerase

RNA polymerase

DNA ligase

RNA ligase
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QUESTION 7

If two molecules of DNA formed during replication are different, what has happened?

perfect replication

transcription

translation

mutation
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QUESTION 8

How do mutations affect the products of DNA replication?

They make identical strands.

They make different strands

They make RNA.

They do not affect the products.
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QUESTION 9

Mutations are avoided during replication because DNA polymerase is able to _________.

repair itself

repair the DNA

encode a message

add more codes
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QUESTION 10

If there is no lactose present, how does bacteria respond?

The gene for beta-galactosidase turns on.

The gene for beta-galactosidase turns off.

Lactose is produced.

Beta-galactosidase production increases.
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QUESTION 11

What is the function of the alpha-globin gene found on chromosome 16 of humans?

codes for 1 of the 2 types of subunits from which hemoglobin is made

codes for an enzyme that causes cells to form a globular mass to clot blood

codes for a carbohydrate that is carried in the blood to give the cells of the body energy

codes for a lipid that balls up in water because it does not mix well with water
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QUESTION 12

What is an exon?

a part of DNA that codes for a functional protein

a part of DNA that does not code for a functional protein

the beginning part of the DNA molecule

the end of part of the DNA molecule
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QUESTION 13

Which of these statements is true?

RNA codes for DNA which codes for proteins.

DNA codes for proteins which codes for RNA.

DNA codes for RNA which codes for proteins.

RNA codes for proteins which code for DNA.
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QUESTION 14

What type of RNA brings amino acids to be attached in sequence according to the information carried in a different type of RNA?

transfer RNA

ribosomal RNA

messenger RNA

nuclear RNA

Respuesta :

1) is Mrna
2) is adenine and guanine;cytosine and thymine
3) is RNA
4) is translation
5) is The double helix is unwound
6) is DNA polymerase
7) is mutation
8) is They make different strands
9) is repair itself
10) is The gene for beta-galactosidase turns off
11) is codes for 1 of the 2 types of subunits from which hemoglobin is made
12) is a part of DNA that codes for a functional protein
13) is DNA codes for RNA which codes for proteins.
I really hope this helps :)

this helped me alot too