NAME ______DATE ______PERIOD ______

The three bases on the tRNA molecule that are complementary to one of the mRNA codons are called the

______.

A. message matchesB. anticodonC. promoterD. exon

According to the base pair rules, which nucleotide is always paired with Adenine IN A DNA MOLECULE?

A. AdenineB. ThymineC. GuanineD. Uracil

DNA replication results in two DNA molecules, ______

A. each with two new strands

B. one with two new strands and one with 2 original strands

C. each with two original strands

D. each with one new strand and one original strand

Which type(s) of RNA is/are involved in protein synthesis?

A. t-RNA only
B. R-RNA only

C. r-RNA and m-RNA only

D. all 3 kinds of RNA are involved in making proteins

Where in the cell does transcription take place?

A. in the nucleus

B. on ribosomes in the cytoplasm

C. in Golgi bodies

D. on the nucleosomes

Where in the cell does translation take place?

A. in the nucleus

B. on ribosomes in the cytoplasm

C. in Golgi bodies

D. on the nucleosomes

How many codons are needed to specify THREE AMINO ACIDS?

A. 3B. 6C. 9D. 12

MATCH THE PROCESS WITH ITS DESCRIPTION:

TRANSLATION TRANSCRIPTION REPLICATION

______Making an complementary RNA sequence from a DNA code (DNA RNA) ______Making a DNA copy of a DNA molecule (DNA DNA)

______Making proteins from an RNA message (RNA  protein)

messenger-RNA transfer-RNA ribosomal-RNA

______Carries the DNA code from nucleus to cytoplasm
______Made by the nucleolus

______Has a CODON region

______Has an ANTICODON region

______

______

______

COMPARE AND CONTRAST

DNA / RNA
Double / Single stranded?
Sugar used?
List all nitrogen bases it has
Which nitrogen base is missing?

SHORT ANSWER:

Name the 3 parts of a nucleotide molecule:

______

If a double helix is compared to a “twisted ladder”, which would the following represent?

Sides of the ladder ? ______

Rungs of ladder ? ______

Glue in the middle that holds the ladder together? ______

/ 5. USE THE mRNA CODE CHART to tell the amino acid sequence coded for by the following message:
U C A A A A U U C

6. Which kind of RNA has an ANTICODON region and carries the amino acids to the ribosome?______

7. Name the parts/structures of a cell:
/ A = ______
B = ______
C = ______
D = ______
E = ______
F = ______

8. Tell 3 ways DNA is different from RNA.

9. When making DNA, CYTOSINE always pairs with ______.

10. Name this subunit used to build DNA and RNA.

11. Give the complementary DNA strand. A T T G C C A G C

19. Name the nucleic acid that is double stranded and contains deoxyribose sugar.

21. If a DNA strand is made of 20% Adenine what percentage of the DNA is made up of:

Thymine:______

Cytosine:______

Guanine:______

22. Compare and contrast a frame-shift mutation and a substitution mutation.

23.Using your codon chart, find the mRNA strand, amino acid sequence, tRNA sequence, and the location of the codons and anti-codons

DNA:A C G T A T A C C A C A T A T

mRNA

tRNA:

Amino Acids:

DNA:T C A T A T A G G G A T A C A

mRNA

tRNA:

Amino Acids:

DNA:T T A C A C A G G A G A C T T

mRNA

tRNA:

Amino Acids:

24. Which set of parents does the soldier belong to? Indicate where each band came from

25. Whose Blood matches that found at the crime scene? How do you know?

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