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BioLab Vol 1 P2

Practical 2

QuestionAnswer
Enzymes are? Organic catalysts that speed metabolic reactions. They are proteins. Therefore they can be affected by pH and temp. They are specific and speed only on type of reaction.
What does Catalase do? Catalase is the specific enzyme for hydrogen peroxide. it is used by cells to rapidly catalyze the decomposition of hydrogen peroxide to less reactive oxygen and water.
What is the effect of Temperature on enzyme Activity? Cold temperatures slow chemical reactions. Warm temperatures speed chemical reactions. Boiling temperatures denature enzyme and change it's shape
Does more enzyme or more substrate speed up a reaction? The higher enzyme or substrate concentration results in faster enzyme activity.
What happens when you change the pH of a solution? Acidic pH-enzyme shape is changed Neutral pH-optimum pH for reactions Basic pH-enzyme shape is changed
What is required for for aerobic and anaerobic respiration? Glucose is generally required.
What is produced by aerobic respiration? Fermentation is taking place and is producing ethanol + Carbon dioxide + 2ATP in yeast and lactate + 2ATP in animals
What is produced by anaerobic respiration? cellular respiration is taking place and is producing Carbon dioxide + Water + 36or38 ATP
What happens when you mix: Yeast + Glucose Yeast + Fructose Yeast + Sucrose Yeast + Water Glucose-Anaerobic-monoasaccaride it is easily broken down. Fructose-Anaerobic-monosaccaride-Easily transformed into Glucose Sucrose-Anaerobic-disacciride-used less effectively, process is slow Water-nothing
What is produced by fermentation? Either Ethanol+Carbon Dioxide or Lactate is produced.
What is produced by Aerobic Respiration? (Cellular Respiration) Carbon Dioxide + Water
Aerobic Cellular Respiration Formula Glucose + (6)Oxygen Gas -----> (6)Carbon Dioxide + (6) Water + 36 or 38 ATP
Photosynthesis Formula (6)Carbon Dioxide + (12)Water -----> Glucose + (6)Water + (6)Oxygen Gas
What is required for photosynthesis? Light
What is produced by photosynthesis? Plants take in Carbon Dioxide and release Oxygen Gas and Water. Producing Carbohydrate and Oxygen.
Where does photosynthesis occur? In the chloroplast.
Where do light reactions take place? In the Thylakiods in the chloroplast.
Where do light-independent reactions take place? In the Stroma in the chloroplast.
Can light reactions or light-independent reaction happen in the dark? Light reactions and Calvin Cycle stop in the dark because ATP synthesis and NADP(pos) reduction require light.
What is a pigment? Pigments are molecules that absorb wave lengths in visible range.
Name the pigments in order from top-most to lowest. Carotene -Yellow Xanthophyll -Yellow orange Chlorophyll a-Blue green Chlorophyll b-Yellow green
What happens in plants in the light? Photosynthesis
What happens in plants in the dark? Cellular Respiration
What happens to green plants in green light? Cellular respiration because the plant can not absorb the green light so it believes that it is dark.
Created by: banken
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