Ch 5 biology test

Question 1

We form the backbone of a DNA helix.

Answer 1

Phosphate and Sugar.

Question 2

I am the building block of DNA.

Answer 2

Nucleotide.

Question 3

I am the type of bond that joins bases.

Answer 3

Hydrogen.

Question 4

I am the nucleic acid that contains uracil as a base.

Answer 4

Purine.

Question 5

I am the kind of sugar found in RNA.

Answer 5

Ribose.

Question 6

I am the workbench of protein synthesis.

Answer 6

Ribosome.

Question 7

I carry the “blueprint” for proteins from the nucleus to the ribosome.

Answer 7

mRNA.

Question 8

I am a single stranded macromolecule.

Answer 8

RNA.

Question 9

I am the kind of sugar found in DNA.

Answer 9

Deoxyribose.

Question 10

I am the opposite of the codon.

Answer 10

Anticodon.

Question 11

I am the organelle where the assembly of the protein takes place.

Answer 11

Ribosome.

Question 12

I carry the amino acids to the ribosome.

Answer 12

tRNA.

Question 13

I am the type of RNA that makes up the structure of the ribosome.

Answer 13

rRNA.

Question 14

We are the bases for DNA.

Answer 14

A-T, G-C.

Question 15

We are the bases for mRNA.

Answer 15

A-U, G-C.

Question 16

I am the nucleic acid that contains thymine.

Answer 16

Pyrimidine.

Question 17

I act as the template for making RNA.

Answer 17

Dna.

Question 18

I am the process that makes mRNA from DNA.

Answer 18

Transcription.

Question 19

What is the function of DNA in the cells?

Answer 19

Code for proteins.

Question 20

Describe the components and structure of a DNA nucleotide.

Answer 20

• Deoxyribose Sugar
• Phospate.
• Nitrogen Base.

Question 21

What forms the sides of the DNA ladder?

Answer 21

Phosphate and Sugar.

Question 22

What forms the rungs of the DNA ladder?

Answer 22

Nitrogen Base.

Question 23

What is meant by the term base-pairing? How is base-pairing involved in DNA replication?

Answer 23

Nitrogen Bases form rungs of ladder by hydrogen bonds. (A-T, G-C)

Question 24

Explain how DNA is replicated. In your explanation, state the role of DNA polymerase and explain why the replication process is considered semi-conservative.

Answer 24

• Dna Polymerase is the catalase to make DNA polymerase.

- Semi constructive in that all copies have a parent (original strand).

Question 25

What are the three differences between RNA and DNA?

Answer 25

- Different sugar. - Single stranded. - Thymine replace with Uracil (RNA)

Question 26

Where is the DNA found in the cell? Nucleus. Where is RNA found in the cell? Nucleus (transcription) cytoplasm, ribosome.

Answer 26

Where is the DNA found in the cell? Nucleus. Where is RNA found in the cell? Nucleus (transcription) cytoplasm, ribosome.

Question 27

Name the three types of RNA and what they do.

Answer 27

- tRNA – carries amino acids. - mRNA – transcribes codes for proteins. - rRNA – ribosomal RNA.

Question 28

What are the steps of transcription?

Answer 28

- Unwind DNA. - Create mRNA for DNA template strand. - Rewind DNA.