DNA Proteins and the Cell Cycle

Select the things DNA nucleotides are made of.

• deoxyribose sugar

• phosphate group

• nitrogenous base

• ribose

• guanine

Select the 4 different nucleotides.

• adenine

• cytosine

• guanine

• thymine

• ribonine

Describe the structure of a DNA molecule.

• DNA strands wrapped around histone proteins then wrapped into nucleosome coil. nucleosomes twisted into coils that twisted into supercoils compacted in chromosome

• formed by two strands of nucleotides held together by hydrogen bonds. two strands are twisted and form double helix with sugar phosphate backbone on outside and nitrogenous base on inside

Describe how DNA is packed into the nucleus

• DNA strands wrapped around histone proteins then wrapped into nucleosome coil. nucleosomes twisted into coils that twisted into supercoils compacted in chromosome

• formed by two strands of nucleotides held together by hydrogen bonds. two strands are twisted and form double helix with sugar phosphate backbone on outside and nitrogenous base on inside

Select the correct pairings for Chargaff's rule.

• thymine and adenine

• cytosine and guanine

• cytosine and thymine

• guanine and adenine

An RNA strand has the following sequence of nucleotides

Uracil adenine adenine guanine cytosine cytosine

What was the nucleotide sequence in the DNA that it was transcribed from?

(use letters in your answer)

A DNA strand has the following sequence of nucleotides

T T T A G C

Select what the RNA sequence will be when this DNA is transcribed.

• A A A U C G

• U C G G A C

• A A A G C U

• A A C T U G

Select two ways RNA is different from DNA.

• RNA has uracil instead of thymine

• RNA has ribose

• RNA has deoxyribose

• RNA has thymine instead of uracil

Introns are part of instructions for making proteins.

• TRUE

• FALSE

Answer explanation

Only exons are part of making proteins.

DNA is transcribed in the __________ and it is translated in the _____at a ______.