basics

Question 1

what are the four biological molecules

Answer 1

proteins carbohydrates nuleic acids lipids

Question 2

carbon is key for which biological molecules ?

Answer 2

proteins lipids n.acids and carbs

Question 3

hydrogen is key for which biological molecules?

Answer 3

carbs proteins lipids n.acids

Question 4

oxygen is key for which biological molecules ?

Answer 4

carbs proteins lipids n.acids

Question 5

nitrogen is key for which biological molecules ?

Answer 5

proteins n.acids

Question 6

sulfur is key for which biological molecules ?

Answer 6

proteins

Question 7

phosphorus is key for which biological molecules ?

Answer 7

n.acids

Question 8

what is covalent bonding ?

Answer 8

atoms share an electron to get a full outer shell so its more stable and no electrons are gained or lost

Question 9

what biological molecules contain covalent bonding

Answer 9

ALL of them e.g water and carbon dioxide

Question 10

what is ionic bonding ?

Answer 10

formed when dissolved in water electrons is outer shell are gained or lost if an atom gains an electron it becomes negative if an atom loses an electron it becomes positive

Question 11

what charge is a cat ion

Answer 11

positive

Question 12

what charge is a anion

Answer 12

negative

Question 13

what is a monomer

Answer 13

a single unit , small molecules that bind to many other identical molecules to form a polymer eg amino acid nucleotides

Question 14

what is a polymer

Answer 14

a large molecule made-up of smaller units eg dna rna proteins

Question 15

what is the joining of many monomers

Answer 15

polymerisation

Question 16

what is a condensation reaction

Answer 16

molecules join together water is removed

Question 17

what is a hydrolysis reaction

Answer 17

water is added to split the units