Lecture 13 Flashcards
1
Q
What is a gene?
A
The unit of inheritance that programs the amino acid sequence of a polypeptide
2
Q
What are genes made of?
A
DNA (a nucleic acid made of monomers called nucleotides)
3
Q
What are the 2 types of nucleic acids?
A
DNA and RNA
4
Q
What is a nucleoside?
A
the nitrogenous base with the sugar
5
Q
what is a nucleotide?
A
the nucleoside (nitrogenous base + sugar) including phosphate group
6
Q
What are the 2 types of nitrogenous base?
A
pyrimidines (C,T,U) and Purines (A,G)
7
Q
What is the sugar of DNA?
A
deoxyribose
8
Q
What is the sugar of RNA?
A
ribose
9
Q
What is thee shape of a DNA molecule?
A
double helix (antiparallel 5’»_space; 3’)
10
Q
What are the complementary base pairing in DNA?
A
A-T and G-C
11
Q
What are the differences between RNA and DNA? (3)
A
- DNA double strand double helix) where RNA is single strand
- In RNA T is changed to U
- DNA sugar is deoxyribose and the RNA sugar is ribose
- base pairing on DNA is on different strands where the base-pairing on RNA is on the same strand
