Genetics Quiz

The shared genetic code of all life on Earth is evidence that ________.

• the genetic code arose relatively late in the history of life on Earth

• bacterial cells arose earlier than eukaryotic cells

• DNA replication is error-free

• all life shares a common ancestry

Peptide bonds form between ________.

• an mRNA transcript and the small ribosomal subunit

• a tRNA and the amino acid it is carrying

• amino acids

• an mRNA codon and a tRNA anticodon

What name is given to the collection of traits exhibited by an organism?

• phenotype
• genotype
• characteristics

In a DNA double helix, adenine pairs with ________ and guanine pairs with ________.

• thymine; cytosine

• guanine; adenine

• cytosine; thymine

• uracil; cytosine

How many nucleotides make up a codon?

• three

• two

• five

• four

What cellular structure facilitates the process of translation?

• smooth endoplasmic reticulum

• lysosomes

• peroxisomes

• ribosomes

Transcription is the ________.

• manufacture of a strand of RNA complementary to a strand of DNA

• modification of a strand of RNA prior to the manufacture of a protein

• manufacture of a protein based on information carried by RNA

• manufacture of two new DNA double helices that are identical to an old DNA double helix

The backbone of DNA consists of ________.

• nitrogenous bases

• a repeating sugar-nucleotide-sugar-nucleotide pattern

• a repeating sugar-phosphate-sugar-phosphate pattern

• paired nucleotides

DNA and RNA are polymers composed of ________ monomers.

• amino acid

• fatty acid

• nucleotide

• carbohydrate

If one strand of a DNA double helix has the sequence ATCCGA, what is the sequence of the other strand?

• ATCCGA

• AGCCTA

• UAGGCU

• TAGGCT