Key Area 1.1- The structure of DNA

Question 1

Base pairs with thymine in DNA(uracil in RNA)

Answer 1

Adenine

Question 2

Parallel strands in DNA running in opposite directions

Answer 2

Antiparallel

Question 3

Nitrogenous substance that is a component of a DNA nucleotide

Answer 3

Base

Question 4

Organelle in which the chemical reactions of photosynthesis occur

Answer 4

Chloroplast

Question 5

Structure that contains the genetic material of an organism encoded into DNA

Answer 5

Chromosome

Question 6

Base that pairs with guanine in DNA

Answer 6

Cytosine

Question 7

Pentose sugar that is a component of a DNA nucleotide

Answer 7

Deoxyribose

Question 8

Deoxyribonucleic acid; a molecule that holds the genetic code in living organisms.

Answer 8

DNA

Question 9

Three- dimensional shape of a DNA molecule

Answer 9

Double- helix

Question 10

Cell with a discrete nucleus

Answer 10

Eukaryotic

Question 11

Base that pairs with cytosine in DNA

Answer 11

Guanine

Question 12

Weak chemical link joining complementary base pairs in DNA

Answer 12

Hydrogen bond

Question 13

Cell organelles in which the aerobic stages of respiration occur

Answer 13

Mitochondria(sing. Mitochondrion)

Question 14

Component of DNA consisting of a deoxyribose sugar, a phosphate group and a base

Answer 14

Nucleotide

Question 15

Component of DNA nucleotide that is derived from phosphoric acid H2PO4

Answer 15

Phosphate

Question 16

Circular loop of genetic material found in prokaryotic organisms and some yeasts

Answer 16

Plasmid

Question 17

Cell that has no discrete nucleus

Answer 17

Prokaryotic

Question 18

Large molecule made up from a chain of amino acids linked by peptide bonds

Answer 18

Protein

Question 19

Strongly bonded strand of DNA

Answer 19

Sugar-phosphate backbone

Question 20

Base that pairs with adenine in DNA

Answer 20

Thymine