Protein Synthesis and Mutations 1

Which of the following units are repeatedly joined together to form a strand of DNA?

• nucleotides

• lipids

• amino acids

• fatty acids

In DNA replication, if the original sequence reads AAT TTG CGC CCA ATT, the complementary DNA strand would read?

• AAU UUC GCG GGU UAA

• AAT TTG CGC CCA ATT

• UUA AAC GCG GGU UAA

• TTA AAC GCG GGT TAA

In a molecule of double-stranded DNA, the amount of CYTOSINE present is always equal to the amount of what nitrogenous base?

• adenine

• guanine

• thymine

• uracil

Why is DNA important?

• because we eat it every day for energy

• it serves as the blueprint for traits of all living things

• it is extremely small and very long

• it is in everything

Tags

NGSS.HS-LS3-1

Transcription is a process that in eukaryotic cells takes place in the ________.

• ribosome

• mitochondria

• cytoplasm

• nucleus

Translation is a process that in eukaryotic cells takes place in the __________.

• ribosome

• endoplasmic reticulum

• nucleus

• vacuole

Tags

NGSS.HS-LS1-1

For proteins to be made, DNA must be copied into________.

• chromosome

• gene

• nucleus

• RNA

Tags

NGSS.HS-LS1-1

The main function of tRNA is to __________.

• bring amino acids from the cytoplasm to the ribosomes

• string together complementary RNA and DNA strands

• carry a message that, when translated, forms proteins

• form a portion of ribosomes

Which of the following statements best describes why a change in only one DNA nucleotide base of a gene on the DNA strand could result in an incorrect protein being produced by the gene?

• The change creates an additional mRNA strand.

• The change causes cells to divide in an uneven way.

• The change alters the amino acid sequence coded for by the

  gene.

• The change prevents mRNA from being made.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

Which of the following nucleotides is NOT present in the mRNA strand after transcription?

• adenine

• thymine

• cytosine

• guanine