Unit 2 Biology Review

Nitrogenous bases are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

Tags

NGSS.HS-LS1-1

Which part of a DNA molecule is responsible for the direct coding of specific traits in an organism?

• The number of hydrogen bonds that hold the strands of DNA together

• The number of carbons in the DNA molecule.

• The sequence of nucleotide bases in the DNA molecule

• The sequences of phosphates along each DNA strand

Tags

NGSS.HS-LS3-1

What is occurring in this picture?

• Translation

• Replication

• Translocation

• Transcription

Use the mRNA below to select the correct amino acid sequence:

AUG-UCA-AAA-UAG

• MET-SER-LYS-STOP

• MET-THR-LYS-TYR

• LEU-SER-CYS-STOP

• ILE-LYS-SER-STOP

Tags

NGSS.HS-LS1-1

Which of the following answer choices correctly identifies each molecule in the above diagram?

• mRNA, 2 - tRNA, 3 - ribosome

• tRNA, 2 - mRNA, 3 - ribosome

• tRNA, 2 - ribosome, 3 - mRNA

• ribosome, 2 - tRNA, 3 - mRNA

What is the sequence of amino acids that will be translated from the mRNA above?

• proline - threonine - alanine - luecine

• proline - leucine - threonine - alanine

• proline - phenylalanine - tyrosine - arginine

• arginine - leucine - threoinine - alanine

Tags

NGSS.HS-LS1-1

The production of a protein is organized by which of the following organelles?

• ribosome

• nucleus

• mitochondrion

• vesicle

Tags

NGSS.HS-LS1-6

Why are insertion and deletion mutations so harmful?

• They change all of the codons from the mutation on down the line, which changes the amino acid sequence

• They insert things that an organism doesn't need.

• They often delete things that organisms need.

• Insertion and deletions are not any more harmful than substitution mutations.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following units are repeatedly joined together to form a strand of DNA? (This is the MONOMER of DNA.) 

• nucleotides

• amino acids

• fatty acids

• polysaccharides

Adenine bonds with ______________.

• Guanine

• Thymine

• Cytosine

• Adenine