bio 2.1

Question 1

what does DNA stand for

Answer 1

deoxyribonucleic acid

Question 2

nucleotide molecule have three parts:

Answer 2

phosphate group, deoxyribose sugar, base

Question 3

DNA is shaped as a

Answer 3

double helix

Question 4

nitrogen rich bases are:

Answer 4

thymine, adenine, cytosine, guanine

Question 5

complementary base pairing

Answer 5

bases pair up only in one way

Question 6

sides of DNA is made up of alternating…

Answer 6

phosphate and sugar groups

Question 7

chromosomes

Answer 7

found in nuclei of all cells in the human body that contains a nucleus

Question 8

each body cell there is… chromosomes

Answer 8

46

Question 9

23 pairs of chromosomes, how many are sex chromosomes

Answer 9

2 (X,X) (X,Y)

Question 10

autosomes

Answer 10

44 non sex chromosomes

Question 11

homologous chromosomes

Answer 11

two chromosomes in a pair, normally one inherited from the father and other from the mother

Question 12

centromere

Answer 12

point on the chromosome where the two chromatids are joined together

Question 13

genes

Answer 13

sections of dna arranged along the chromosome

Question 14

genetic code

Answer 14

the order of bases along the DNA

Question 15

genes in a chromosome differ by:

Answer 15

genetic code and length