DNA and RNA

Which of these statements about DNA is NOT TRUE?

• DNA has a double helix structure

• DNA is made up of nucleotides

• DNA uses the nitrogen bases adenine, cytosine, uracil and guanine

• DNA can replicate

What are the three components of a nucleotide? (choose three answers)

• Nitrogen base

• Genes

• Sugar

• Phosphate Group

• Polymerase

One strand of DNA has the nitrogen bases: AAT TCG GAA. What is the order of nitrogen bases on the opposite DNA strand?

What are proteins made of?

• amino acids

• sugars

• alleles

• RNA

Tags

NGSS.HS-LS1-6

Which is TRUE about RNA?

• It has a double helix structure

• It contains deoxyribose sugar

• It makes identical copies of DNA

• It uses uracil as a nitrogen base instead of thymine

What does mRNA do?

• Makes up ribosomes and helps to hold amino acids together

• Copies the nucleotide sequence of DNA and takes it out of the nucleus

• Delivers amino acids to ribosomes to make proteins

• Separates the two strands of DNA so replication can occur

The first step in making proteins is to make mRNA rom DNA. What is this process called?

• transcription

• replication

• translation

• mutation

DNA has a nucleotide sequence of TTG CCC AAG. What is the nucleotide sequence of mRNA after transcription?

The second step in the process of making proteins is for ribosomes to read mRNA and use the instructions to assemble amino acids into proteins. What is this process called?

• transcription

• translation

• replication

• mutation

Ribosomes read mRNA codons. What is a codon?

• A group of three nitrogen bases that code for one amino acid

• A group of three amino acids that code for a protein

• One nitrogen base that codes for three amino acids

• Three nitrogen bases that code for three amino acids