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Kay [80]
2 years ago
15

What happens in photosystem II?

Biology
2 answers:
netineya [11]2 years ago
4 0
<h2>Answer:</h2>

The correct answer is option A which is, "Electrons are re-energized to be used in NADPH production".

<h3>Explanation:</h3>

In photosystem II, light energy is used to split water molecules which release electrons.

These electrons then move to photosystem I to reduce NADP to NADPH.

Hence electrons in photosystem II are ultimately used to produce NADPH and option C is the correct statement.

Pavlova-9 [17]2 years ago
4 0

Answer: A

Explaxnation:

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What is the importance of understanding Mendel's laws of segregation and independent assortment?
andriy [413]
Well first off, Mendel’s law of segregation states that individuals possess two alleles and a parent passes only one allele to his/her offspring. Mendel’s law of independent assortment states the inheritance of one pair of factors (genes) is independent of the inheritance of the other pair. Now Mendel discovered this through his little experiment with the pea plants that showed certain traits through a particular pattern, subsequently becoming the foundation of modern genetics and heredity.
7 0
2 years ago
Read 2 more answers
La polidactilia en la especie humana se debe a un alelo dominante. Entre Francisco y Martha, ambos abuelos de Santiago, uno de e
lesya [120]

Answer:

  • Abuelo/a con polidactilia heterocigoto, Pp
  • Abuelo/a normal, pp
  • Juan normal, pp
  • Esposa de Juan con polidactilia, PP o Pp
  • Santiago con polidactilia, Pp

Explanation:

<u>Datos disponibles</u>:

  • Polidactilia es causada por un alelo dominante, P.
  • El alelo recesivo p produce numero normal de dedos.
  • Francisco y Martha → Abuelos → uno de ellos con polidactilia
  • Juan → Hijo → Normal, pp
  • Santiago → Nieto → Polidactílico

Uno de los padres, ya sea Francisco o Martha, es polidactílico, lo que implica que ésta persona tiene, por lo menos, un allelo dominante en su genotipo, P- (El simbolo "-" esta representando un alelo dominante o uno recesivo).

Si Juan es normal, entonces su genotipo es pp, lo que significa que recibió un alelo recesivo de su padre y otro de su madre. Es decir que el parental policactílico es heterocigota, de forma que pudo heredarle un alelo recesivo a Juan. El otro parental probablemente sea normal, pp, pudiendo solo heredarle a Juan el alelo recesivo.

Entonces, uno de los padres tiene genotipo Pp (heterocigota) y el otro pp (homocigota recesivo).

Juan es norma, pp.

Santiago, hijo de Juan, es polidactílico, lo que implica que lleva en su genotipo por lo menos un alelo dominante, P. Pero Juan solo pudo heredarle un alelo recesivo, p. Por lo tanto, Santiago es heterocigota para la característica, Pp, y heredó el alelo dominante de su madre, que puede ser homcigota dominante PP o heterocigota Pp.

Supongamos que Francisco es polidactílico y Martha normal.

<u>1º Cruza</u>: Francisco x Martha

Parentales) Pp    x    pp

Gametas) P    p     p      p

F1) 1/2 = 50% Pp

    1/2 = 50% pp → Juan

<u>2º Cruza</u>: Juan  x Esposa (opción uno: esposa homocigota dominante)

Parentales) pp    x     PP

Gametas)   p    p      P     P

F2) 4/4 = 100% Pp → Santiago

<u>2º Cruza</u>: Juan  x  Esposa (opción dos: esposa heterocigota)

Parentales)  pp    x     Pp

Gametas)   p    p      P     p

F2) 1/2 = 50% Pp → Santiago

      1/2 = 50% pp

6 0
2 years ago
Complete the statement to describe the calcium concentration that must be maintained in human body cells.
andrezito [222]

Answer:

The calcium concentration must be greater OUTSIDE

the cell than INSIDE the cell.

Explanation:

Calcium has a vital role in the body, it is necessary for:

  • exocytosis
  • muscle contraction
  • normal excitability of neurons
  • blood coagulation
  • building and maintaining bones and teeth
  • enzymatic activity
4 0
3 years ago
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S calling an object dumb personification
Luba_88 [7]
Dumb isn’t necessarily a human characteristic. i suppose it will depend on the context.
8 0
2 years ago
How much force is required to accelerate a 10 kg mass upward with rate of 5
nika2105 [10]

Answer:

C. 0.5 N

Explanation:

But I'm not 100% sure

4 0
3 years ago
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