Which is the main structural difference between DNA and RNA nucleotides? The number of phosphate groups attached to the sugar ring. The types of purines can attach to the sugar ring. The presence or absence of a hydroxyl group at the econd carbon of the sugar ring. The number of carbons in the sugar ring.

What effect do restriction enzymes have on DNA? Select one: Restriction enzymes repair damaged portions of DNA. O Restriction enzymes cleave DNA at specific sequences into fragments. Restriction enzymes give a negative charge to DNA. Restriction enzymes duplicate DNA.

"Unlike what happens in DNA replication, where both strands are copied, only one of the two strands is transcribed into mRNA. The DNA strand that contains the gene is sometimes called the sense strand, or coding strand, and the DNA strand that gets transcribed to give RNA is called the antisense strand, or noncoding strand. Because the sense strand and the antisense strand are complementary, and because the DNA antisense strand and the newly formed RNA strand are also complementary, the RNA molecule produced during transcription is a copy of the DNA sense strand... The only difference is that the RNA molecule has a U everywhere the DNA sense strand has a T." Consider the following segment of a DNA sense strand: (5') CAA-ACT-ACG-GCG-TTG-CAG (3') (a) Determine the base sequence in the antisense (non-coding) strand. Be sure to specify which end is 5' and which is 3'. (b) Determine the base sequence in the messenger RNA strand. Be sure to specify which end is 5' and which is 3'.

What is this type of molecule? HO Lipid Carbohydrate DNA Protein Ill H H WI H OH

If 22% of the nucleotides in a sample of DNA contain the base adenine (A), then 22% of the nucleotides in the same sample of DNA contain the base guanine (G). True or False True False

Select all the TRUE statements related to stability of nucleic acids. Single-stranded RNA is stabilized by base pairing that can occur between different segments of the sequence DNA fidelity is critical because DNA structure is maintained long-term in a cell Errors in mRNA sequence can be tolerated because each molecule is used for a short time and then degraded Any mutation in DNA sequence will result in a completely disrupted protein structure Both rRNA and tRNA and more stable than mRNA because they serve structural roles over a longer time frame One each new copy of the DNA genome is produced, the old DNA strands are degraded

Deoxyadenosine monophosphate (dAMP) and guanosine monophosphate (GMP) are nucleotides. The similarities between dAMP and GMP are that they both have? -an alpha (central) carbon.-the same R group.-a phosphate group.-a pentose (5 sided) sugar-an amino group-a nitrogenous base.