WorksheetsRevisión de la fotosíntesis
Total questions: 13
Worksheet time: 12mins
In photosynthesis, chlorophyll functions in changing
glucose molecules to starch
water and carbon dioxide to sugar
light energy to chemical bond energy
hydrogen bonds to water
Over a 24-hour period, which factor would have the least effect upon the rate of photosynthesis in a plant?
Concentration of carbon dioxide in the air
Quality of the soil
Wavelengths of light
Availability of water in the soil
The basic inorganic materials used during photosynthesis are
H20 (Water) and C6H12O6 (Glucose)
O2 (Oxygen) and CO2 (Carbon Dioxide)
H2O (Water) and CO2 (Carbon Dioxide)
CO2 (Carbon Dioxide) and C6H12O6 (Glucose)
Photosynthesis transforms molecules of water and carbon dioxide into molecules of
Oxygen Only
Sugar and Oxygen
Protein and oxygen
polypeptide and nitrogen
Why do plants look green?
Mention the pigment that is in plants and how light interacts with that pigment.
The diagram below represents a cell of a green plant. Solar energy is used to produce energy-rich compounds in structure
A
B
C
D
The diagram below represents a cross section of a leaf of a green plant, showing an opening (stomate) in the lower surface.
A stomate in the lower surface of the leaf has a function most similar to the function of which cell structure?
cell membrane
vacuole
ribosome
nucleus
The leaves of a plant are dotted with openings known as stomata. When open, stomata allow the plant to exchange gases and allow moisture to evaporate, helping to draw water from the roots up into the plant. These activities help the plant to
produce light energy
Conduct photosynthesis
Decompose organic matter
Synthesize minerals
A green plant is kept in a brightly lighted area for 48 hours. What will most likely occur if the light intensity is then reduced slightly during the next 48 hours?
Photosynthesis will stop completely
.
The rate at which nitrogen is used by the plant will increase
The rate at which oxygen is released from the plant will decrease
Glucose production inside each plant cell will increase
If the process illustrated in the diagram is interrupted by a chemical at point X, there would be an immediate effect on the release of
Chlorophyll
Nitrogen
Carbon Dioxide
Oxygen
A cell in the leaf of a corn plant contains more chloroplasts than a cell in the stem of a corn plant. Based on this observation, it can be inferred that, when compared to the cell in the stem, the cell in the leaf
Synthesizes (makes) more sugar
Has a higher chromosome count
Produces fewer proteins
Uses less carbon dioxide
Plants normally lose water from openings (stomates) in their leaves. The water loss typically occurs during daylight hours when plants are exposed to the Sun. This water loss, known as transpiration, is both beneficial and harmful to plants.
Scientists believe wind and high temperatures increase the rate of transpiration, but the size of each stomate opening can be controlled by the plant. Reducing the size of the openings during drought conditions , with little water, may help reduce the dehydration and wilting that would otherwise occur.
A leaf may lose more than its own weight in water each day. Transpiration also lowers the internal temperature of the leaf as water evaporates. On hot days, temperatures in the leaves may be from 3° to 15°C cooler than the outside air. With stomates open, vital gases may be exchanged between the leaf tissues and the outside environment.
1. State one way transpiration is beneficial to plants.
2. Identify two of the "vital gases" that are exchanged between leaf tissues and the outside environment.
