A scientist is using a species of green algae to study the electron transport chain in photosynthesis. He uses a laser to inactivate all of chlorophyll A in the algae but leaves chlorophyll B intact (case 1). In a separate experiment, the scientist applies a chemical to the algae that inhibit PS I but do not affect PS II (case 2).
Which of the following results is expected?
A)in case 1, only PS I completely loses function; in case 2, no proton gradient is produced.
B)In case 1, only PS I completely loses function; in case 2, a proton gradient is still produced.
C)In case 1, both PS I and PS II completely lose function; in case 2, no proton gradient is produced.
D)In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.

Answers

Answer 1

Answer:

D) In case 1, both PS I and PS II completely lose function; in case 2, a proton gradient is still produced.

Explanation:

The light dependent reaction of photosynthesis, which produces the ATP and NADPH needed in the light independent stage of the process, includes complexes of proteins and pigments called PHOTOSYSTEMS. These photosystems (I and II) are key to the functionality of the light dependent reactions in the thylakoid.

The major pigment present in both photosystems is CHLOROPHYLL A, which absorbs light energy and transfers electrons to the reaction center. Chlorophyll B is only an accessory pigment meaning it can be done without. Hence, if all of the chlorophyll A is inactivated in the algae but leaves chlorophyll B intact as in case 1, both PS I and PS II will lose their function because Chlorophyll A is the major pigment that absorbs light energy in both photosystems.

In case 2, if PS I is inhibited and PS II is unaffected, a PROTON GRADIENT WILL STILL BE PRODUCED because the splitting of water into protons (H+) and electrons (e-) occurs in PSII. Hence, H+ ions can still be pumped into the inner membrane of the thylakoid in order to build a proton gradient even without the occurrence of PS I.


Related Questions

For the chemical formula C6H12 how many
carbons and hydrogens are there?

Answers

6 carbon
12 hydrogen

I’m pretty sure

Why do you think in the table below, Adenine and Thymine have almost the same number – but not exactly?

Nucleotide

# found in genome

Adenine

701,234,142

Guanine

803,127,160

Cytosine

803,127,162

Thymine

701,234,146

Answers

Adenine pairs with thymine and Guanine pairs with cytosine. The numbers are not exactly the same because of the mutations that happen in DNA. Some of the DNA could be broken off or put somewhere else in the gene that would throw everything off, nothing is perfect. However in a perfect world, both adenine and thymine would have the same numbers.

Jorge hits a drum as hard as he can, and it makes a loud sound. Then he hits the same drum with less strength, and it makes a quieter sound. Which statement best explains why hitting the drum at different strengths produces sounds at different volumes? A. The vibrations are the same at each strength. B. The vibrations are different at each strength. C. The pitch is the same at each strength. D. The pitch is different at each strengh​

Answers

Answer:

D is the answer

^_^

^ Above is the right answer

Other Questions
The balance scale shows the equation 2x + 3 = 2y + 5.Which equation can be used to calculate x?x = y + 2x=y-2x = y + 1x = y -1 How does the density and distribution of your stars change as the balloon expands? PLEASE HELP URGENTLY!!! I WILL GIVE BRAINLIEST TO WHOEVER GETS IT RIGHT. Record the mass of the object based on the reading from the triple-beam balance. The mass of the object is ____ grams. HELP ASAP Describe the government's role in creating thefoundation for a market economy. . Write a Python command to assign the value 80.35 to a variable called 'point'. Marina was immunized against chicken pox when she was young. Which of the following statements is true?Marina was exposed to a weak form of chicken pox antigen.The immunization provided Marina with passive immunity.Marina needs to be immunized again because antibodies do not last long in the body.Since she was immunized, it is impossible for Marina to contract chicken pox. y= p2 + qr write p in terms of y, q and r please help please help please help please help please help please help please help please help A 5.3 kg block rests on a level surface. The coefficient of static friction is _s=0.67, and the coefficient of kinetic friction is _k= 0.48 A horizontal force, x is applied to the block. As x is increased, the block begins moving. Describe how the force of friction changes as x increases from the moment the block is at rest to when it begins moving. Show how you determined the force of friction at each of these times before the block starts moving, at the point it starts moving, and after it is moving. Show your work. The San Antonio missions were built In which of the following governmental systems can the chief executive make a policy decision and have it carried out by the cabinet without involving the legislature?A.in both a presidential system and a parliamentary systemB.in neither a presidential system nor a parliamentary systemC.in a parliamentary systemD.in a presidential system is this correct? ILL MARK YOU BRAINIEST what were some strategies used by the labor unions to address the problematic working conditions of the time period. Select the section(s) of the graph where the function is decreasing.1. blue line 2. red line3. curved blue line4. green linecan be more than one While planning a new product launch, Cassandra knew that the art department was ready to work on the promotional pieces right away. But they are not able to start until the strategy group established the price point and the purchasing group obtained the paper needed to make the promotional piece. Establishing price points would take about a week and was dependent on manufacturing getting the costs to the strategy group. This was expected a week from today. The purchasing group indicated the paper could be obtained locally the same day it was requested. Based on this information and assuming things go according to plan, when will the art department be able to begin work on the promotional pieces?A. 1 weekB. 1 monthC. 1 dayD. 2 weeks An apple tree can grow about 400 apples. Jake says that 13 apple trees can grow about 6,000 apples. Do you agree? Explain.Answer: No. Since 13400=5,200, 13 apple trees can grow about 5,200 apples. Jake's estimate of 6,000 is much higher than 5,200. Acceleration is sometimes expressed in multiples of g, where g = 9.8 m/s^2 is the magnitude of the acceleration due to the earth's gravity. In a test crash, a car's velocity goes from 26 m/s to 0 m/s in 0.15 s. How many g's would be experienced by a driver under the same conditions? For the chemical formula C6H12 how manycarbons and hydrogens are there? A ticket for the spring musical is $4.50. Which table show the relationship between the number of tickets purchased and the total price paid?