click below
click below
Normal Size Small Size show me how
Bio Test 01/10/2020
Question | Answer |
---|---|
What is a hypothesis | An educated guess of the answer to your question |
Steps of the scientific method | Observation, Hypothesis, Controlled experiment, Collect data, Forming a conclusion, Compare conclusion with existing knowledge, Report and publish result, Develop theory. |
Random selection | A process of choosimg without a method to be scientifically tested |
Replicate | To repeat the test |
Double blind testing | When neither the tester nor the patient knows what threatment was given |
Placebo | A substance with no medication used as control |
What's an experiment | A controlled test where only 1 variable is changed at a time |
Food is needed for.... | Energy, Growth of new cells, Repair of damaged existing cells |
Food also supplies the material and energy for the processes of... | Metabolism Continuity |
Food is made up of 6 chemical elements | Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulpher |
Salts are made up of... | Sodium, Magnesium, Clorine, Potassium, Calcium |
What are the 3 trace elements | Iron, Copper, Zinc |
Carbon, oxygen and hydrogen are required for... | Making carbohydrates, fats, proteins, DNA and vitamins in an organism |
Nitrogen is required for | Making all proteins (hair, nails, enzymes, hormomes) |
Phosphorus is an essential element in.. | DNA |
Sulphur is an essential element in.. | Enzymes |
Carbohydrates is made of 3 element | Carbon, Hydrogen, Oxygen |
The chemical formula I learned is | Cx (H2O)y e.g C6 H12 O6, If x is 6 then whatever is after H or something else is the number u multiply by |
What is a bio molecule | An organic chemical produced and found in a living organism |
What is the structural role of bio molecules | The function/job of carbohydrates, fats, proteins in making various parts of living things |
There are w cell structures | Cellulose Chitin |
Where is cellulose found and what is it's other name | Found in plant cell walls, Polysaccharide |
Where is chitin found in and what's it's name | Found in fungal cell walls and exoskeletons. Polysaccharide |
Proteins are like what in nature | Fibrous threadlike |
Name the 2 proteins and their structural role | Keratin - protein in skin hair and nails. Myosin - protein in muscle |
Structural role of lipids are.. | Heat insulation, Protection around organs |
Name the 2 major components in cell membranes | Phospholipids, Lipoproteins |
Metabolic role of bio molecules | The function of carbohydrates, lipids, proteins in the chemical reactions in cells making various substances for living things |
What does metabolism mean | All the chemical reactions in cells |
Respiration is... Photosynthesis is... | Respiration is catabolism, Photosynthesis is anabolism |
All enzymes are... And have a... ..., Enzymes control the... In cells | All enzymes are PROTEINS amd have a FOLDED SHAPE, enzymes control the CHEMICAL REACTIONS in cells |
2 types of proteins by their shape. | Globular and Fibrous |
Globular proteins are... | Long straight chains of AMINO ACIDS with LOTS of foldings, they are the ones that have a metabolic role |
Fibrous proteins are... | Long chains of AMINO ACIDS with LESS foldings and are involved in structural role |
Vitamin C is made up of... | Water soluble and ASCORBIC acid |
Vitamin C's function is... | Building connective tissue, e.g ligaments, blood vessels, skin |
Vitamin D is made up of... | Calciferol and fat soluble |
Vitamin D's function is... | Absorb calcium from food |
Source of vitamin d | Dairy products, egg yolks |
What are minerals | They are salts formed from the earth's rocks, these mineral salts then dissolve in water and are absorbed by plants, very small amounts |
In plants what does calcium form | Middle Lamela |
In plants what does magnesium form | Chlorophyll |
In plants what does iron form | Enzymes |
In plants what is copper needed for | Electron transfer chain |
In animal's what does calcium form | Bones |
In animal's waht does magnesium form | Bones |
In animal's what does iron form | Haemoglobin which carries oxygen |
In amimals what is copper needed for | Electron transfer chain |
Name some of the physical properties of water | Slow to heat up and cool down, Good absorber of energy, movement of material, controls cell shape, universal solvent, medium for metabolism, reactant/product |
Organelles I need to know | Cell membrane, Nucleus, Mitochondria, Chloroplast, Ribosomes, DNA, Cell wall, Vacuole |
Eukaryote | Organisms whose cells contain a nucleus and other membrane bound organelles |
Prokaryotes | Organisms whose cels never contain a nucleus and other membrane bound organelles. |
Diffusion | Movement of molecules from a region of higher concentration to a region of lower concentration of that molecule, NO ENERGY REQUIRED |
Active transport | Movement of molecules from a less crowded to a more crowded area WITH THE USE OF ENERGY. Molecules are carried into or out of the cell using some of the cell's energy. |
Osmosis | DOESN'T REQUIRE ENERGY. A type of diffusion, the movement of water from a high concentration to a low concentration of water |
Osmosis occurs across a what type of membrane | Semi permeable membrane |
Osmosis occurs in eveyday life, how? | Food gets preserved with the use of salt or sugar, the loss of water in bacteria and fungus kills them which makes the food last longer e.g jam |
Membranes can be 3 types of permeable | Permeable - let's everything in and out. Semi permeable - let's some things in and out. Impermeable - let's nothing in and out |
What is turgid | The pressure of the contents of a cell against the cell wall. |
What are Enzymes | Enzymes are catalysts made up of protein that speeds up a reaction without being used up in the reaction |
Most Enzymes are ... Proteins | Globular proteins |
The substance that an enzyme acts on is it's... | Substrate |
The substance that the enzyme forms in is called the.... | Product |
Enzymes = .... | Product Maltose |
Enzymes are... Which means they only act on.... | Enzymes are SUBSTRATE SPECIFIC which means they only act on 1 SUBSTRATE |