B4 - Using food and controlling growth

Question 1

Do Prokaryotic cells have nucleus?

Answer 1

No

Question 1

Can Eukaryotic cells make multicellular organisms>

Answer 1

Yes

Question 2

Test for sugars

Answer 2

Benedicts will turn from blue to green, yellow, or red when heated

Question 3

Test for starch

Answer 3

Iodine solution will turn from brown to black

Question 4

Test for protein

Answer 4

Biurets solution will turn from blue to purple

Question 5

Test for lipids

Answer 5

Add ethanol and shake, if lipids are present, a white, fatty emulsion will appear

Question 6

What are stem cells

Answer 6

Cells which can differentiate into specialised cells

Question 7

How to stem cells divide

Answer 7

by mitosis

Question 8

Which stem cells in humans can differentiate into any specialised cell

Answer 8

embryonic stem cells, which humans only have whilst they are an embryo

Question 9

What can adult stem cells do

Answer 9

differentiate into a certain type of specialised cells, e.g different types of blood cells

Question 10

Where are plant stem cells found

Answer 10

In the meristems

Question 11

what is the meristems

Answer 11

plant tissue, which contains the plants stem cells

Question 12

How long do plants keep their stem cells

Answer 12

Their whole life

Question 13

What stage do embryonic cells stop being unspecialised

Answer 13

The 8 cell stage

Question 14

What is the process of stem cells becoming specialised called

Answer 14

differentiation

Question 15

what is the name for the process of cells becoming specialised

Answer 15

differentiation

Question 16

What type of reaction is respiration

Answer 16

Exothermic

Question 17

Where does aerobic respiration occur

Answer 17

in the mitochondria

Question 18

where does anaerobic respiration occur

Answer 18

in the cytoplasm

Question 19

what is the word equation for anaerobic respiration

Answer 19

glucose —> lactic acid

Question 20

what is the word equation for anaerobic respiration in plants and yeast

Answer 20

glucose —> ethanol + carbon dioxide

Question 21

What is the name of the first phase of the menstruation cycle, and what is this cycle, and how long does it last

Answer 21

Menstruation, which is the breakdown of the previous uterus lining, which causes bleeding, it lasts four days

Question 22

What is phase 2 of the menstruation cycle, and how long does it last

Answer 22

The lining starts to rebuild, preparing for a fertilized egg, this lasts 10 days

Question 22

What is the name of phase 3, and what occurs, and how long does it last

Answer 22

Phase 3 is menstruation, and it lasts for a single day. It involves the release of a egg from one of the ovaries

Question 23

What is the final stage of menstruation

Answer 23

The uterus lining being maintained.

Question 24

What does progesterone stimulate

Answer 24

It maintains the uterus lining

Question 25

What does oestrogen stimulate

Answer 25

It stimulates the growth of the uterus lining

Question 26

What does FSH stimulate

Answer 26

Stimulates one of the eggs to mature in the ovaries

Question 27

What does LH stimulate

Answer 27

The release of the matured egg, responsible for menstruation