DNA and PCR

What is the correct sequence?

• RNA --> DNA --> Protein
• Protein --> RNA --> DNA
• DNA --> RNA --> Protein
• DNA --> Protein --> RNA

Some yeast genes can be replaced by human genes that then continue to produce the same human proteins in the yeast cells. Which statement helps to explain this evidence?

• The DNA of yeast and humans is identical.

• Yeast and humans have the same number of chromosomes.

• The genetic code is universal.

• Yeast and humans are both eukaryotes.

This image shows that DNA Replication is _______.

• Conservative
• Semiconservative
• Dispersive
• Spontaneous

What part of a nucleotide accounts for the genetic variation between individuals?

• phosphate
• nitrogenous base
• deoxyribose
• sugar

What are the functions of genes?

• instructions for producing proteins
• instructions for producing DNA
• instructions for producing lipids
• they have no function

Every three letters (example: ATC) in DNA codes for what??

• Amino Acid
• Nucleotide
• Lipid
• Carbohydrate

tRNA is involved in

• carrying amino acids 
• carrying ribosomes
• carrying glucose
• carrying lipids

What does mRNA do?

• provides information from DNA to ribosomes
• transfers amino acids to the ribosomes
• makes up ribosomes
• builds proteins

What does rRNA do?

• provides information from DNA to ribosomes
• transfers amino acids to the ribosomes
• makes up ribosomes
• builds proteins

What is the purpose of PCR?

• To produce millions of copies of the DNA genome

• To produce millions of copies of a specific region of DNA

• To add nucleotides to a DNA sequence

• To watch polymerase work.