Transcription, Translation and Heredity Quiz

1. Which base is normally used in the synthesis of RNA but not in the synthesis of DNA?

• adenine

• cytosine

• Uracil

• Guanine

1. A strand of messenger RNA is transcribed from an original strand of DNA. The original bases on the DNA strand were T-A-C-G. What is the base sequence on the RNA strand produced from this?

• U-A-G-C

• T-A-G-C

• C-G-A-U

• A-U-G-C

1. Which of the following is incorrect in comparing DNA to RNA?

• Both molecules are composed of nucleotides

• DNA contains deoxyribose while RNA contains ribose.

• DNA is single stranded while RNA is double stranded

• RNA has uracil while DNA has thymine

   

1. If a DNA sequence consists of 12 nucleotides, how many mRNA codons will there be?

• 1

• 4

• 6

• 8

• 12

1. The enzyme that creates mRNA from a DNA sequence is called:

• Ligase

• Gyrase

• Helicase

• DNA Polymerase

• RNA Polymerase

During transcription _________

• DNA is made complimentary to RNA

• RNA is made complimentary to DNA

• A protein is made from the RNA base sequence

• A protein is made from the DNA base sequence

A sequence of three nitrogenous bases in a messenger RNA molecule is known as a

• codon

• Anticodon

• Amino acid

• Nucleotide

Use this diagram (and your own knowledge) to answer questions 10-11. The diagram represents molecules involved in protein synthesis. Where does the synthesis molecule 2 take place?

• in the nucleus

• in the cytoplasm

• in the ribosomes

• none of the above

1. The building blocks of molecule 3 are known as ________________?

• Amino Acid

• Nucleotides

• Fatty Acids

• Monosaccharide

1. During protein synthesis, which type of molecule attaches particular amino acid molecules and positions them in specific positions on the polypeptide chain?

• DNA

• mRNA

• tRNA

• ADP