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Margarita [4]
3 years ago
5

How are electrons moved from photosystem II to photosystem I in photosynthesis?

Biology
1 answer:
slavikrds [6]3 years ago
4 0
Electrons<span> are transferred from water to plastiquinone in the presence of light. The cytochrome bf complex catalyzes the transfer of </span>electrons<span> from plastoquinol to plastocyanin.</span>
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Why were different organisms
Andreyy89
To be honest I don’t really know
6 0
1 year ago
Suppose two independently assorting genes are involved in the pathway that determines fruit color in squash. These genes interac
makvit [3.9K]

Answer:

100% yellow fruit color, Yyww.

Explanation:

<u>Available data</u>:

  • two independently assorting genes
  • the W allele codes for a dominant white phenotype
  • w allele codes for a colored squash
  • The allele Y codes for a dominant yellow phenotype
  • the allele y codes for a recessive green phenotype
  • The phenotypes from the first locus will always mask the phenotype produced by the second locus if the dominant allele (W) is present at the first locus. This masking pattern is known as dominant epistasis

Epistasis means "interruption" and refers to interactions between genes located in different loci in the same chromosome. An “epistatic gene” can alter, influence, or suppress the expression of a "hypostatic gene". When the epistatic gene is dominant, the interaction is known as "dominant epistasis".

W suppresses the expression of Y and y, this means that whenever W is present, the fruit is white. If W <u>is not</u> present, the fruit color can be expressed.

So, the proposed cross in the present problem occurs between a green fruited individual and yellow fruited individual, which suggests that W is absent.

<em>Genotype for Green fruit: yyww</em>

<em>Genotype for purebred Yellow fruit: YYww</em>

Cross:

Parental) YYww    x    yyww

Gametes) Yw  Yw  Yw  Yw  yw  yw  yw  yw

Punnet square)    Yw       Yw       Yw      Yw

                 yw    Yyww  Yyww  Yyww  Yyww

                 yw    Yyww  Yyww  Yyww  Yyww

                 yw    Yyww  Yyww  Yyww  Yyww

                 yw    Yyww  Yyww  Yyww  Yyww

F1) 100% Yellow fruited plants, Yyww

As these two genes assort independently, we can also represent the cross for each gene by separate, like this:

For w gene:

Parental) ww  x  ww

Gametes) w w w w

Punnet square)  w     w

                 w     ww   ww

                 w      ww  ww

F1) 4/4 or 100% colored-fruits

For Y gene:

Parental) YY  x  yy

Gametes) Y Y y y

Punnet square)  Y     Y

                 y     Yy     Yy

                 y     Yy     Yy

F1) 4/4 or 100% yellow fruits, Yy.

3 0
3 years ago
If C-1 of glucose is radiolabeled and the glucose then enters glycolysis, what percentage of the pyruvate molecules will carry t
Talja [164]

Answer:

50%

Explanation:

Glucose is a simple sugar with a total of 6 carbon atoms in its structure. Pyruvate has a total of three carbon atoms. Two molecules of pyruvate are obtained per glucose by glycolysis.  None of the carbon of glucose is released in the form of CO2 during glycolysis. Therefore, the radio-labeled C-1 of glucose will be the component of the carbon skeleton of one of the total of two pyruvate molecules produced during glycolysis. So, 50% of the pyruvate will exhibit radioactivity.

5 0
3 years ago
Which statement correctly uses the model above to explain how mitosis maintains genetic continuity? A. The chromosomes in cell 1
Bezzdna [24]

Answer:

B

Explanation:

8 0
3 years ago
Which will have the greatest impact on the effects of disease in a population?
fenix001 [56]

nutrition is the answer bcz without nutrition the diseases will effect more in a population

3 0
3 years ago
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