Protein Synthesis n Stuff

Which model of base pairing is correct for DNA?

• A=T and C=G
• A=C and T=G

• A=T and G=U

• A=G and T=C

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

• Substitution
• Deletion
• Insertion
• Frameshift 

Tags

NGSS.HS-LS3-2

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

What is a codon?

• It is a three letter section of bases that are read by ribosomes to identifying the amino acids which will go into a protein

• They are the codes on the DNA (hence "code-on"
• It is a type of mutation that occurs when there has been a substitution, deletion or insertion

• A series of 3 letters found on tRNA which transfers the amino acid to the ribosome

Why are insertion and deletion mutations so harmful?

• They change all of the codons from the mutation on down the line, which changes the amino acid sequence
• They insert things that an organism doesn't need.
• They often delete things that organisms need.
• Insertion and deletions are not any more harmful than substitution mutations.

Tags

NGSS.HS-LS3-2

ATTTGAGCC- Original
ATTGAGCC - Mutated
The example above is an example of a 

• Insertion- Frameshift
• Deletion- Substitution
• Deletion -Frameshift
• All of the above

Tags

NGSS.HS-LS3-2

This diagram can be used to specify amino acid sequences in creating polypeptides. Which sequence of the genetic code would produce a polypeptide with the amino acid sequence Ala-Arg-Pro? 

• GCA AGA CCU

• GAC CUG CUC

• GCC AGU CCG

• ACG GCG UCC

Tags

NGSS.HS-LS1-1

A type of substitution in which no  amino acids change is called 

• Missense
• Nonsense
• Silent
• Deletion

Tags

NGSS.HS-LS3-2

What is the correct mRNA strand from this DNA?

CAC-GTG-ACA-GCG

• GTG-CAC-TGT-CGC

• CAC-GUG-ACA-GCG

• GUG-CAC-UGU-CGC

• CUC-GAG-TCT-GGG

The codon (set of 3 nitrogen bases) codes for 1 of 20

• endoplasmic reticulum
• RNA
• genes
• amino acids

Tags

NGSS.HS-LS1-1