B4 - Using food and controlling growth Flashcards
Do Prokaryotic cells have nucleus?
No
Can Eukaryotic cells make multicellular organisms>
Yes
Test for sugars
Benedicts will turn from blue to green, yellow, or red when heated
Test for starch
Iodine solution will turn from brown to black
Test for protein
Biurets solution will turn from blue to purple
Test for lipids
Add ethanol and shake, if lipids are present, a white, fatty emulsion will appear
What are stem cells
Cells which can differentiate into specialised cells
How to stem cells divide
by mitosis
Which stem cells in humans can differentiate into any specialised cell
embryonic stem cells, which humans only have whilst they are an embryo
What can adult stem cells do
differentiate into a certain type of specialised cells, e.g different types of blood cells
Where are plant stem cells found
In the meristems
what is the meristems
plant tissue, which contains the plants stem cells
How long do plants keep their stem cells
Their whole life
What stage do embryonic cells stop being unspecialised
The 8 cell stage
What is the process of stem cells becoming specialised called
differentiation
what is the name for the process of cells becoming specialised
differentiation
What type of reaction is respiration
Exothermic
Where does aerobic respiration occur
in the mitochondria
where does anaerobic respiration occur
in the cytoplasm
what is the word equation for anaerobic respiration
glucose —> lactic acid
what is the word equation for anaerobic respiration in plants and yeast
glucose —> ethanol + carbon dioxide
What is the name of the first phase of the menstruation cycle, and what is this cycle, and how long does it last
Menstruation, which is the breakdown of the previous uterus lining, which causes bleeding, it lasts four days
What is phase 2 of the menstruation cycle, and how long does it last
The lining starts to rebuild, preparing for a fertilized egg, this lasts 10 days
What is the name of phase 3, and what occurs, and how long does it last
Phase 3 is menstruation, and it lasts for a single day. It involves the release of a egg from one of the ovaries
