Biology 2 key concepts

Question 1

What is eukaryotic cells

Answer 1

Cells that have a nucleus

Question 2

What is a prokaryotic cell

Answer 2

Cells with no nucleus

Question 3

Difference between animal and plant cells

Answer 3

-
Plant -cell wall , permanent vacuole, chloroplast

Question 4

Bacterial cell

Answer 4

Cell membrane, cell wall, cytoplasm ,ribosomes, strand of dna , plasmids , flagella

Question 5

What are enzymes

Answer 5

Biological Catalyst which speeds up reactions

Question 6

What are enzymes made up of

Answer 6

Amino acids

Question 7

How do enzymes work

Answer 7

They have an active site which complement to the substrate
Although if it doesn’t fit the reaction will not speed up

Question 8

What is the role of enzymes in digestion

Answer 8

Break down the large molecules which we eat to small molecules which we can absorb

Question 9

How is carbohydrates Brocken down

Answer 9

By amylase to make smaller sugars , maltose

Question 10

How are proteins Brocken down

Answer 10

By protease to make amino acids

Question 11

How are fats ,lipids Brocken down

Answer 11

By lipases to glycerol and fatty acids

Question 12

Where are they all made

Answer 12

Pancreas and small intestine

Question 13

What is optimum temperature

Answer 13

Highest temperature before it denatures

Question 14

What is the optimal ph

Answer 14

The ph where the enzymes work best

Question 15

What is is osmosis

Answer 15

Water molecules from from high to low concentration through a partially permeable membrane

Question 16

What is active transport

Answer 16

Movement of molecules against concentration gradient from low to high , requires energy from cellar respiration

Question 17

Where is active transport used

Answer 17

Root hair cells , need to absorb water and mineral to survive , the minerals that they need are at a higher concentration an adaptation is that they have lots of mitochondria