Unit 4.2 2nd try

What is the complimentary mRNA sequence to the DNA sequence A-T-T-G-C-A.

• T-A-A-C-G-T
• U-A-A-C-G-T
• U-A-A-C-G-U
• T-A-A-G-C-U

What mutation has occurred here? 
T-G-A-C-C-A
T-G-A-G-C-A

• Substitution
• Deletion
• Insertion
• Frameshift 

Which defines a codon in DNA or mRNA?

• pair of nucleic acid and sugar
• pair of phosphate and sugar
• three-base code
• two-base code

Are all mutations bad?

• Yes
• No

The "central dogma" states that genetic information flows from 

• Protein-->mRNA-->DNA
• Protein-->DNA-->mRNA
• mRNA-->DNA-->Protein
• DNA-->mRNA-->Protein

In RNA, the nitrogen base____ replaces ____ that was present in DNA. 

• A, U (adenine, uracil)
• C, G (cytosine, guanine)
• U, T (uracil, thymine)
• U, A (uracil, adenine)

Transcription takes place in the 

• cytoplasm
• ribosome
• mitochondrion
• nucleus

Translation occurs in the

• nucleus
• mitochondria
• cytoplasm
• golgi apparatus

What does rRNA represent?

• Ribosomal RNA

• Reconstructed RNA

• Reactive RNA

• Reusable RNA

Anticodons are complementary to...

• codons

• amino acids

• nucleotides

• nitrogenous bases