DNA and RNA

Question 1

know how to compare DNA and RNA

Answer 1

DNA

 Contains deoxyribose sugar unit
 Double stranded
 Nitrogenous bases are: adenine,
guanine, cytosine and thymine
 Complementary base pairings:
 A-T and G-C
 Resides in the nucleus

RNA

 Contains ribose sugar unit
 Single stranded
 Nitrogenous bases are: adenine,
guanine, cytosine and uracil
 Complementary base pairings:
 A-U and G-C
 Resides in the nucleus and
cytoplasm

Question 2

Messenger RNA (mRNA)

Answer 2

 acts as the messenger between the DNA and the ribosome
 translated into a protein by ribosomes
 the sequence of nucleotides is derived from the DNA sequence in the gene

Question 3

Transfer RNA (tRNA)

Answer 3

 is the delivery system of amino acids to the ribosomes as they synthesize the proteins
 very short

Question 4

Ribosomal RNA (rRNA)

Answer 4

Ribosomal RNA (rRNA)
 binds with proteins to form ribosomes (structural component of the ribosome)

 varies in length

Question 5

Name all of the junk DNA

Answer 5

Microsatelite DNA (VNTR)

Telomeres

intorns

non-coding genes

gene regulators