RNA and Protein Synthesis

A partial DNA segment and an mRNA codon chart are shown. What amino acid sequence is encoded in the partial DNA segment: 3' T C A T G C A T G 5'?

• Serine-Threonine-Tyrosine

• Serine-Serine-Tyrosine

• Serine-Threonine-Methionine

• Serine-Alanine-Methionine

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Students are modeling mRNA during the process of protein synthesis. Which answer choice correctly describes the model of the mRNA strand being transcribed?

• The mRNA strand is complementary to the DNA template strand; however, uracil instead of adenine is paired with thymine.

• The mRNA strand is complementary to the DNA template strand; however uracil instead of thymine is paired with adenine.

• The mRNA strand is an exact copy of the DNA template strand; however, uracil instead of adenine is paired with thymine.

• The mRNA strand is an exact copy of the DNA template strand; however, uracil instead of thymine is paired with adenine.

A sequence of a DNA template strand is show. 3' TCC AAT GGC TTA TTT GCA 5'. Which of these is the correct amino acid chain produced from the DNA template strand?

• Arginine-Leucine-Proline-Asparagine- Lysine-Arginine

• Tryptophan-Phenylalanine-Leucine-Glycine-Asparagine-Phenylalanine

• Serin-Leucine-Proline-Asparagine-Lysine-Arginine

• Tryptophan-Phenylalanine-Leucine-Glycine-Asparagine-Serine

Tags

NGSS.HS-LS1-1

Which statement about the students’ comments is correct?

• Student A is correct, because translation occurs in the nucleus.

• Student B is incorrect, because replication is the process that makes a duplicate copy of DNA.

• Student B is correct, because the DNA must be copied before mitosis.

• Student A is incorrect, because the purpose of translation is to convert DNA to RNA.

Tags

NGSS.HS-LS3-2

This type of RNA transports amino acids to the ribosome for protein synthesis.

• mRNA

• rRNA

• tRNA

• All of the above

The main function of tRNA is to...

• carry a message that, when translated, forms proteins

• form a portion of ribosomes

• string together complementary RNA and DNA strands

• bring amino acids from the cytoplasm to the ribosomes

​ (a)   : forms part of ribosomes, cell's protein factories

​ ​ (b)   : brings amino acids from cytoplasm to a ribosome to help make growing proteins.

​ (c)   : intermediate message that is translated to form a protein

• rRNA

• tRNA

• mRNA

Which type of RNA is responsible for bringing amino acids to the ribosome?

• mRNA

• rRNA

• tRNA

• DNA

Match the following processes with their descriptions.

• Process of forming a complex substance from simpler substances

• transcription

• Process of converting mRNA into protein

• translation

• Process of copying DNA to produce identical DNA molecules

• replication

• Process of producing mRNA from DNA

• 
  synthesis

Tags

NGSS.HS-LS1-1

Match the following processes with their products

• mRNA

• translation

• protein

• replication

• DNA

• transcription

Tags

NGSS.HS-LS1-6