Enzymes 1
Enzymes 2
plants 1
plants 2
100
Which statement about Enzymes is not true?
they are all made of Starch
they can be used again and again
they speed up reactions
their chemical structure remains unchanged after the reaction
they are all made of Starch
100
Enzymes have multiple compatible substrates. True or False?
False
100
Which of the following is a product of photosynthesis?
Glucose
100
What is the name of the green pigment that traps light energy from the Sun?
Chlorophyll
200
Where is the active site
1, 7, 8, 6, 10 All are correct
200
Describe an Enzyme
They are proteins that function as biological catalysts
200
Which of the following is not an important role for glucose?
Used to make proteins
Stored as starch
Used for energy
Used for osmosis
Used for osmosis
200
Identify the feature that is responsible for the transport of some of the products of photosynthesis from the leaves to the roots.
Phloem
300
What is protease?
Protease is an enzyme responsible for breaking down proteins into smaller peptides or amino acids during the process of digestion. It plays a crucial role in the digestion of dietary proteins into nutrients that can be absorbed by the body.
300
What will happen if Enzyme 2 is denatured?
the concentration of molecule B will increase Explanation: If Enzyme 2 is denatured, molecule B will not be broken down. This will mean: the concentration of molecule B increases (because it is still being produced by reaction 1, but it is no longer being broken down) the concentration of molecule C will decrease (because molecule B is not being broken down) the concentration of molecule D will decrease (because there is less of molecule C, which is the substrate for reaction 3).
300
Maryam notices that her plant has stunted growth. She wants to buy some fertiliser to help the plant grow as big and healthy as possible. Which mineral should she make sure is in the fertilizer she buys?
Nitrates
300
What is x.
Palisade mesophyll layer
400
Explain the function of amylase in the digestive system and its significance in breaking down carbohydrates?
Answer 2: Amylase is an enzyme primarily produced in the salivary glands and pancreas, crucial for carbohydrate digestion. Its role involves breaking down complex carbohydrates like starch and glycogen into simpler sugars such as maltose and glucose. This enzymatic action initiates the process of carbohydrate digestion, enabling the body to absorb these nutrients for energy production and other metabolic functions.
400
Describe how increasing the temperature changes the rate of reaction in an enzyme
As the temperature increases the rate of reaction will increase however at extreme temperatures the enzyme will denature and lower/stop rate of reaction.
400
Identify the mineral that is most responsible for giving plants their green color.
Magnesium
400
State the name of the layer that prevents water loss from the leaves of a plant by evaporation.
Cuticle
500
Q: Discuss the intricate relationship between temperature and enzyme activity, considering factors such as kinetic energy, molecular collisions, and denaturation. How do these factors interplay to regulate enzymatic reactions within biological systems?
A: Temperature influences enzyme activity through several mechanisms. As temperature increases, molecules gain kinetic energy, leading to more frequent collisions between enzymes and substrates, thereby increasing the rate of reaction. However, excessively high temperatures can disrupt the weak bonds maintaining the enzyme's tertiary structure, causing denaturation and loss of function. Additionally, temperature variations can affect the shape and fit of the active site, altering the enzyme's affinity for its substrate. This intricate interplay between temperature and enzyme activity is crucial for maintaining optimal physiological conditions within living organisms.
500
Name three ways an enzyme reaction can be increased
temperature, pH, enzyme concentration, substrate concentration
500
describe the effects of varying light intensity, carbon dioxide concentration and temperature on the rate of photosynthesis, e.g. in submerged aquatic plants
The rate of photosynthesis in submerged aquatic plants is influenced by varying light intensity, carbon dioxide concentration, and temperature. Higher light intensity generally increases photosynthetic rate, up to a certain saturation point. Increased carbon dioxide concentration also tends to boost photosynthesis until it reaches a plateau. Temperature affects enzyme activity, with an optimal range for photosynthesis. However, extreme temperatures can denature enzymes, leading to decreased photosynthetic rates.
500
Describe the function and structure of the Spongy mesophyll layer
Cells are loosely spaced in this layer to allow diffusion of gases throughout the leaf