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olchik [2.2K]
4 years ago
12

The oxygen released during photosynthesis comes from molecules of water True or False

Biology
1 answer:
dlinn [17]4 years ago
8 0

Answer: False

Photolysis takes place in the light dependent reaction of the photosynthesis. The reaction can be represented as:  H 2 O + 2 photons --> 2 e  −   + 2H  +   + O.  Here, the electrons released are accepted by the photosystem to fulfill the electron gap. The last electron acceptor is the oxygen and thus, the oxygen is liberated from the water molecule. The experiments conducted by Samuel Ruben and Martin Kamen by using radioactive isotopes helped to prove that the oxygen liberated during photosynthesis came from photolysis the water.

Explanation:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.Carbon dioxide is released during photosynthesis. Plants which synthesise their food themselves are called saprotrophs.

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Organisms that make energy in the form of glucose are called ____.
Slav-nsk [51]

Answer:

Producers ( also called autotrophs) are the organisms that synthesize their own ( glucose) food using carbon dioxide and water in the presence of sunlight ( photosynthesis). They use energy from sunlight to convert it into chemical energy ( that is stored in the glucose). Autotrophs occupy the base of a food chain within the ecosystem as they are first trophic level for the energy transfer.

Decomposers ( such as bacteria and fungi that act on dead plants and animals) can recycle the organic matter back into the food web and biogeochemical cycles in the form of nutrients such as carbon and nitrogen.

Thus, the correct answers are-

1) Producers

2) Decomposer

3) Sunlight

4) Base

6 0
4 years ago
A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of
Anna71 [15]

Answer:

chloroplasts and mitochondria.

Explanation:

Chloroplasts and mitochondria are the organelles capable of ATP production by photophosphorylation and oxidative phosphorylation respectively. Chloroplasts are the site for photosynthesis. The light reactions of photosynthesis include splitting of the water molecule in presence of sunlight and transfer of electrons from PS-II to PS-I via electron carrier. During electron transport, a proton gradient is created which in turn drives ATP synthesis.  

Mitochondria are the site for aerobic stages of cellular respiration. Glycolysis and Kreb's cycle, the first and second stages of cellular respiration produce NADH and FADH2 during the redox reactions. These reducing powers are oxidized by giving their electrons to the terminal electron acceptor, the oxygen molecule.

Electrons from the reducing powers are carried to oxygen molecules via a series of electron carrier proteins embedded in the inner mitochondrial membrane. During electron transport, an electrochemical gradient is created which in turn drives the ATP synthesis.

8 0
4 years ago
What causes competition in an ecosystem
SVETLANKA909090 [29]

Answer:

survive- air, water, food, and space

Explanation:

Organisms compete for the resources they need to survive- air, water, food, and space. In areas where these are sufficient, organisms live in comfortable co-existence, and in areas where resources are abundant, the ecosystem boasts high species richness (diversity).

6 0
3 years ago
What is a synonym for net force?
pickupchik [31]

Answer:

resultant force, force, acceleration, physics, and rotation

4 0
3 years ago
When two cars collide which of the following is NOT evidence that energy is being transferred? A: a sound is produced
Lostsunrise [7]

Answer:

C: the drivers attempt to stop before the accident

Explanation:

6 0
3 years ago
Read 2 more answers
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