Unit 6 Review Part 2: Molecular Genetics

A strand of DNA has the following base sequence. ACG-GTA-AGC. What would be the complementary mRNA strand?

• TGC-CAT-TCG

• ACG-GUA-AGC

• UGC-CAU-UCG

• ACG-GTA-AGC

What role does transfer RNA have in translation?

• it repairs damaged DNA

• it binds with an unzipped strand of DNA to copy DNA nucleotide sequences

• it transports energy from the mitochondrion to the ribosome so that translation can take place

• it carries amino acids to the ribosome

What type of mutation is responsible for Down Syndrome?

• substitution during mitosis

• frameshift mutation during mitosis

• translocation during meiosis

• nondisjunction during meiosis

What is the importance of the codons in protein synthesis?

• each codon is the code for a particular amino acid

• each codon is the code for a nucleotide sequence

• each codon is the code for one of the bases found in DNA

• each codon is the code for a base found in RNA

Tags

NGSS.HS-LS1-1

Genes determine inherited traits such as eye color. Genes contain the information needed to form which of the following?

• chromosomes

• proteins

• carbohydrates

• hormones

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

NGSS.HS-LS3-1

Which mRnA sequences could code for Valine-Serine-alanine?

• GGG-UAA-GCC

• GUG-UCU-CGG

• AUG-UCG-CGU

• GUU-AGU-GCG

In which way does RNA differ from DNA?

• RNA is double stranded

• RNA is single stranded

• RNA is found only in the nucleus

• RNA contains nitrogenous bases

A gene gives the instructions for protein synthesis. Which type of molecule is responsible for “reading” the instructions and then creating the protein?

• ATP

• RNA

• DDT

• DNA

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

The directions found in a strand of DNA are copied onto mRNA during which process?

• replication

• synthesis

• transcription

• translation

This diagram shows a section of DNA with the four bases adenine, thymine, guanine, and cytosine. From left to right, what is the correct order for the bases represented by the question marks on the opposite side of the DNA strand?

• TTCGCA

• GGATAC

• CCUAUG

• CCTATG

Tags

NGSS.HS-LS1-1