The diagram provides a useful model to illustrate which of these statements about gene expression? A. Transcription factors control gene expression by binding to regulatory sites of DNA.
B. Transcription factors control gene expression by altering the nucleotide sequence of DNA.
C. Cells use epigenetic mechanisms to control gene expression without changing DNA.
D. The histones of chromatin, instead of DNA, may be transcribed during gene expression.

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

Research question: why are the carrots that grew on the left side of the garden larger than the carrots that grew on the right side of the garden? which hypothesis is based on this research question? a comparison of people with gardens to people without gardens will show who is likely to live longer. b. carrots are thought to be good for your eyesight and should be eaten regularly. c. carrots that are provided lots of sunlight grow to a larger size than carrots grown in the shade. d. eating fresh vegetables every day is a healthy thing to do.

Fill in the blank with the best word to complete the sentence. white blood cells protect against and aid in blood clotting when injuries are sustained.