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Give a general description of the light and dark reactions of photosynthesis. Light – light energy is converted into chemical energy (ATP) Dark – Carbon fixation – carbon is fixed into organic molecules (sugars) using ATP and enzymes

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17 Dec 2019
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Related questions

Hi, I need help with this question. Please and thank you

20 Petri dishes of radish seeds are prepared as follows: each Petri dish receives with a disk of absorbent, but otherwise inert, filter paper and 5 mL of distilled water are added to each disk, then 2 grams of dry radish seeds are spread over each moist disk. 10 dishes are put in a dark cupboard and the other 10 are put on a sunny windowsill. The investigator checks the dishes daily and adds water equally as needed. Seeds in both treatments germinate within 2 days. At the end of 10 days, the plant material on each Petri plate is dried and weighed. The results are:
•Average sunny windowsill dry weight: 2.25 g
•Average dark cupboard dry weight: 1.75 g
**Question consists of three parts**

(1) Which of the following correctly lists the independent and dependent variables for this experiment?
A. Independent: Sun.
Dependent: Shade
B. Independent: Amount of light.
Dependent: Plant weight
C. Independent: Plant weight.
Dependent: Amount of water
D. Independent: Amount of water
Dependent: Plant weight

(2) What is the best explanation for why the dark grown seedling lost biomass?
A. The metabolism in the cells of the seeding in the dark increased to compensate for the lack of light energy
B. Cellular respiration needed for growth does not occur as efficiently in plants in the dark as in plants exposed to light
C. Cellular respiration in the cells of the seedlings consumed the starch and oils present in the seeds as sources of energy
D. The seeds in the dark decomposed

(3) What is the best explanation for why the light-grown seedlings gained biomass?
A. Cellular respiration converted chemical energy stored as starch into chemical bind in ATP
B. Photosynthesis converted sunlight to biomass
C. The seeds in the light absorbed oxygen and gained weight
D. Photosynthesis reduced carbon dioxide to glucose




What is the role of fungus in the food web shown?

◯ A. To gather green light in order to carry out photosynthesis.

◯ B. To break down organic matter into carbon dioxide and water.

◯ C. To convert light energy into chemical energy organisms can use.

◯ D. To break down food molecules in the absence of oxygen.

Plants are net ____ consumers and _____ producers.

TRUE or FALSE: During photosynthesis, glucose is made during the light-independent (dark) reactions.

TRUE or FALSE: The products of photosynthesis are carbon dioxide and water.

What is the main product of photosynthesis?

What is the energy source for the process of photosynthesis?

In what organelle does photosynthesis occur?

TRUE or FALSE: All organisms’ lives depend of photosynthesis.

Animals are net ___ consumers and net ____producers.

What are discrete packets of kinetic energy in light?

Give two examples of accessory pigments for photosynthesis.

TRUE or FALSE: The primary photosynthetic pigment chlorophyll a.

What is the empirical formula for glucose?

During glycolysis, molecules of glucose are broken down into ___ molecules of _____.

Which comes first: glycolysis, kreb cycle, or electron transport chain?

Where in the cell does glycolysis occur?

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