Review

Review

DNA Replication & Protein Synthesis

DNA vs RNA

DNA is double stranded

DNA is made with the sugar deoxyribose

DNA contains the nitrogen bases- adenine, guanine, thymine, and cytosine.

Multiple Choice

Which sequence of DNA bases would pair with this partial strand
CAT TCA CTG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

Multiple Choice

What is the backbone of DNA made of?

• Nitrogen bases
• Amino acids
• Double H
• Sugar & Phosphate

Multiple Choice

What is the purpose of DNA replication?

• Cut the DNA 
• Make more cells
• Apoptosis
• Duplicate the DNA

DNA vs RNA

• RNA is single stranded

• RNA is made with the sugar ribose

• RNA contains the nitrogen bases- adenine, guanine, cytosine, and uracil

Protein Synthesis or the creation of proteins happens in two steps.

• Step 1: Transcription

• Step 2: Translation

Transcription

• Occurs in the nucleus.

• During transcription, DNA is transcribed into mRNA.

• The base pair rules used during transcription are…

  o  A - U

  o  T - A

  o  C - G

  o  G- C

Multiple Choice

How would the DNA sequence GCTATA be transcribed to mRNA?

• GCUAUA
• CGATAT
• CGAUAU
• GCUTUT

Multiple Choice

How does RNA differ from DNA?

• RNA contains uracil and deoxyribose
• RNA contains ribose and thymine
• RNA contains uracil and ribose
• RNA contains adenine and ribose

Multiple Choice

One difference between DNA and RNA is that....

• Only RNA has the base Uracil
• only RNA contains the base Thymine
• only RNA contains the base Cytocine
• only RNA contained the base Guanine

Translation

• Occurs at the ribosome

• mRNA is translated into an amino acid sequence

• The mRNA strand is read by the ribosome in three letter chunks called a codon.

• The final product of translation is a protein.

Multiple Choice

What amino acid is represented by the codon UUA?

• Phenylalanine
• Tyrosine
• Leucine
• Stop codon

Multiple Choice

Which of the following is the site of translation?

• vacuole
• lysosome
• nucleus
• ribosome

Multiple Choice

Choose the nucleotide sequence of the RNA strand that would be complementary to the following strand: 
GTAGTCA

• UATUAGA
• ACGACTG
• CAUCAGU
• CATCAGT