Unit 6 - Molecular Genetics - SchoolNet Aligned

Base your answer to the following question on the structures represented in the diagram below. What is the relationship between these three structures?

• DNA is made up of proteins that are synthesized in the cell.

• Protein is composed of DNA that is stored in the cell

• DNA controls the production of protein in the cell.

• The cell is composed only of DNA and protein.

The sequence of DNA below is part of a gene. How many amino acids are coded for by this segment?

• 4

• 8

• 12

• 20

A scientist puts nucleotide chains of UUUUUU in a test tube under conditions allowing protein synthesis. Soon the test tube is full of polypeptide chains composed only of the amino acid phenylalanine. What does this experiment indicate?

• The amino acid phenylalanine is composed of uracil.

• UUU codes for the amino acid phenylalanine.

• Protein synthesis malfunctions in test tubes.

• Most proteins contain only one type of amino acid.

A diagram of a cellular process is shown below. Which of the following identifies the process shown at point Z?

• Translation

• Translocation

• Replication

• Transcription

Which of the following carries amino acids to the site of protein synthesis?

• mRNA

• tRNA

• rRNA

• nRNA

The table below gives the codons found in messenger RNA (mRNA). Based on the table above, determine the sequence of amino acids produced by this DNA sequence: 5’ GCAGTTTTC 3’?

• Arg - Gln – Lys

• Cys - Gln - Lys

• Ser – Phe – Phe

• Ala - Val – Phe

The diagram below shows a vital cell process. Which process is illustrated in this diagram?

• replication

• transcription

• translation

• fermentation

If the DNA triplets (code) are ATG CGT, then the tRNA anticodons would be

• UAC GCA

• CAU ACG

• ACG UAC

• AUG CGU

Transcription is a process that occurs in cells. Which is the best description of transcription?

• DNA is copied.

• A RNA template is used to make proteins.

• A DNA template is used to generate RNA.

• A DNA sequence is used to activate enzymes in a cell

The diagram below represents a portion of a nucleic acid molecule. The part indicated by arrow X could be

• adenine

• ribose

• deoxyribose

• phosphate