Sirs Lesson(bio+chem)🌿🧑🏾‍🔬

Question 1

What are atoms with overall charge?

Answer 1

Ions

Question 2

What are the sugar molecule used by cells in respiration?

Answer 2

Glucose

Question 3

What is the force attraction between oppositely charged particles?

Answer 3

Electrostatic attraction

Question 4

What is an ionic bond?

Answer 4

Intramolecular (bonds inside)
Occurs between a metal and not metal
+ ions from metals mostly
And - ions from non metal
Due to electrostatic forces of attraction between them.

Question 5

What is a covalent bond?

Answer 5

Intramolecular(bonds Inside)
Occurs between non metals atoms,which share a pair of electrons.

Question 6

Why are ions essential to normal bodily function?

Answer 6

1-Conduction of nerve impulses
2-regulate osmotic pressure(water balance)
3-muscle contraction

Question 7

What biological molecule are formed from non metal joined by by a covalent bond?

Answer 7

-protein
-carbohydrates
-lipids

Question 8

What is a hydrogen bond?

Answer 8

is like a weak magnet-like attraction between a hydrogen atom and an oxygen, nitrogen, or fluorine atom in different molecules.
It occurs due to differences in electro negativity

Question 9

Example of hydrogen bond from the lesson.

Answer 9

So basically hydrogen is partially positive as when it binds with oxygen,oxygen is more electronegative (electron attracting) so the electron spends more time near oxygen making it partially negative and less form hydrogen thus partially positive.

Question 10

What is a monomer?

Answer 10

A molecule that can be bonded to other molecules to form a polymer

Question 11

What is a polymer?

Answer 11

A compound comprising very large molecules that are multiples of simpler chemical unit(monomers)

Question 12

What monomer is protein made of?

Answer 12

Polypeptide(amino acids)

Question 13

What polymer is sugar made of?

Answer 13

Polysaccharide

Question 14

What polymer is DNA made of?

Answer 14

Polynucleotide
Nucleotide bases

Question 15

How polymers made and the name of reaction?

Answer 15

-Polymerasation
-Condensation reaction,because every time a subunit is added a molecule of water is lost
-Chain is formed when monomer subunits react with terminal end of growing polymer

Question 16

What happens when polymers break down?

Answer 16

-Hydrolysis
(Water splits)
-And added back to the 2 subunits

Question 17

What is glycogen and why is it branched?

Answer 17

-is an energy store made branching chain of glucose
-branching helps enzyme to release energy

Question 18

What is cellulose in plants and why is it unbranched?

Answer 18

-Is a structural molecule made of long chains of unbranded glucose
-unbranched to give a uniform form of support of cells structure

Question 19

What is a monosaccharide?

Answer 19

A monomer of carbohydrates

Question 20

What is the energy storage for plants?

Answer 20

Starch

Question 21

How is a disaccharide formed?

Answer 21

-It is a reaction between monosaccharides e.g glucose,fructose,galactose -forming a glycosidic bond
And forming water from the 2 subunits

Question 22

Tell me what forms the 3 disaccharides are formed?

Answer 22

Maltose:2 glucose monomers
Sucrose:glucose and galactose e.g sugar
Lactose:formed from glucose and fructose monomer.

Question 23

How is a polysaccharide formed?

Answer 23

-by the condensation of many glucose units

Question 24

What is an isomer?

Answer 24

It means Different forms

Question 25

What 2 isomers does glucose have?

Answer 25

Alpha(1 same) and beta glucose (2 different)

Question 26

What is glycogen and starch formed by?

Answer 26

Condensation of alpha glucose

Question 27

What is cellulose formed by?

Answer 27

Condensation of beta glucose