1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
boyakko [2]
3 years ago
8

The textbook the quantum efficiency for photosynthesis decreases abruptly when the wavelength of light being used becomes longer

the 680 nm. Which ONE of the following is the explanation for this "red drop"?
A. The reactions that extract electrons from water to make O2 take place in the photosystem that is activated by 680 nm light.
B. Red light inhibits photosynthesis.
C. Photosystem I requires 680 nm light
D. Red light is absorbed CO2 to initate the synthesis of carbohydrates.
Biology
1 answer:
Elis [28]3 years ago
6 0

Answer:

The correct answer will be option- A

Explanation:

Red drop effect is the effect observed by the light present in the spectrum of the wavelength of red light. The effect is observed with the decrease in the quantum yield of the oxygen formed per quantum of light when the wavelength of light exceeds 680 nm.

The decrease of quantum yield is observed due to the fact that the oxygen is formed by the breakdown of the water molecule during light-dependent reaction which is initiated by the PS II which begins the chain at 680nm.

If light exceeds the 680 nm then, PS II will remain inactive and thus will abrupt the dissociation of the water molecule and thus the formation of oxygen during the light-dependent phase.

Thus, option-A is the correct answer.

You might be interested in
Explain how reactions involving carbon-containing compounds can contribute to the greenhouse effect.
Dennis_Churaev [7]

The combustion of the carbon results in the generation of the carbon dioxide and the carbon monoxides. Other than this, the reaction of the carbon compounds also causes the release of methane. The reaction of the carbon with various substances also result in the formation of CFCs (Chlorofluorocarbons)

All the mentioned gases are well known green house gases. All the green house gases traps the heat in the earth's atmosphere and cause global warming.  


6 0
3 years ago
Where is dna found inside of a cell
tino4ka555 [31]

Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.

4 0
2 years ago
Read 2 more answers
Which of these resources cannot be renewed? biomass, hydropower,geothermal, fossil fuel
vagabundo [1.1K]
The correct answer among the options given is the last option. Fossil fuels are the resources that cannot be renewed. Resources that cannot be renewed or replenished are referred as non-renewable resources. Fossil fuels are made for very long periods of time and cannot be replenished instantly.
3 0
4 years ago
Read 2 more answers
Explain the two different patterns of circulation found in vertebrates.
Liono4ka [1.6K]

Answer:

Single loop

Double loop

Explanation:

Circulatory system in the body helps in the transport of oxygen, nutrients and other important substances in the body.

Single loop circulatory systems involves blood passing through the heart only once on each circuit around the whole of the blood circulation system of the animal.

Double loop means there are two loops in our body in which blood circulates. One is oxygenated which means oxygen rich and the other is deoxygenated, which means it has little to no oxygen, but a lot of carbon dioxide.

5 0
3 years ago
Which medical word is used to refer to cancer of the white blood cells?
olganol [36]
The medical word for it is called leukemia. my moms a nurse and my dads a doctor at john Hopkins hospital. so I know a lot of this stuff. <span />
7 0
3 years ago
Other questions:
  • Using complete sentences, compare and contrast the terms living and biotic. In your response, illustrate using examples and appr
    15·2 answers
  • What is the equation with which you can calculate population density?
    7·1 answer
  • What was Charles Darwin's major accomplishment?
    5·1 answer
  • Why are bacteria necessary for life on Earth to exist?
    7·1 answer
  • Which of the following model organisms is a multicellular worm usedto study the process of development? a)Saccharomyces cerevisi
    9·1 answer
  • Plant organs include stems and
    7·2 answers
  • What are the two specific concerns of species diversity?
    8·1 answer
  • Fenómeno que consiste na combustão de grandes áreas florestais e conduz à libertação de grandes quantidades de CO2 para a atmosf
    11·1 answer
  • Which of the following describes a frameshift mutation?
    6·2 answers
  • I’m not sure if I’m anywhere close to right on this, can someone simply review it and give me feedback? Please! Giving all my po
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!