Question

fill in the blanks:
dna is composed of sugar, phosphate, and four ____bases____ (a, t, g, c). during
transcription, dna is made into a m057ecule of ____|_______ which will travel to the
_________ in the cytoplasm, here, three bases, called a _________ will
determine what _____________ acid is added to the chain. this chain will fold into a
______________________ . the shape of this molecule determines how it functions.

changes in the dna code are called
_______________ and they can
cause a protein to not function properly.
a single change in the dna of the
hemoglobin gene will cause
______________ cell anemia.

Explanation:

1. DNA has four nitrogenous bases (A, T, G, C).
2. Transcription produces mRNA (messenger RNA) from DNA.
3. mRNA moves to the ribosome in the cytoplasm.
4. A codon is a three - base sequence on mRNA that codes for an amino acid.
5. Amino acids are added to form a polypeptide chain which folds into a protein.
6. Changes in DNA code are mutations.
7. A single change in the hemoglobin gene causes sickle - cell anemia (the correct term is "sickle" for the cell type).

Answer:

1. nitrogenous
2. (messenger) RNA (mRNA)
3. ribosome
4. codon
5. amino
6. protein
7. mutations
8. sickle