a cell has 6 unreplicated chromosomes. how many replicated chromosomes does the cell have after chromosome replication?

High-energy electrons are transported from chlorophyll to other molecules in the chloroplast by

nirvana33 [79]

Answer:

The most appropriate answer would be C.electron carriers such as NADP⁺.

High energy electrons are transported through electron transport chain embedded in a thylakoid membrane in order to produce energy rich compounds such as ATP and NADPH.

It is also called as light dependent reaction of photosynthesis. It includes four major protein complexes: photosystem II, photosystem I, cytochrome b6f complex, and ATP synthase.

The electron first gets excited from chlorophyll a present in the reaction center (P₆₈₀ and P₇₀₀) of two photosystems (PS II and PS I) . The electron in PS II is replenished by photolysis of water.

Different electron carriers (such as plastoquinone, plastocyanin, pheophytin, chlorophyll A₀ etc) are present which help in transferring this high energy electron from one complex to another. NADP⁺ is the final acceptor of the electron and gets reduced to NADPH.

NADPH and ATP are then used in dark reaction in order to fix carbon into sugars.

4 0

3 years ago

Any change or random error in a DNA sequence

Sever21 [200]

Any change or random error in a DNA sequence is called a mutation.

7 0

4 years ago

What causes the lunar phases we see on Earth? help plz

saw5 [17]

Answer:

C

Explanation:

Its that becuase it makes most sense

4 0

3 years ago

A. Bacteriophage MS2 carries its genetic information in RNA. Its chromosome is analogous to a polygenic molecule of mRNA in orga

Paraphin [41]

Answer:

Aspartate (CUG)

Explanation:

5-bromouracil is a base analog that can induce mutations in the DNA strand by causing mispairing in replication. The 5-bromouracil can pair with adenine or guanine in template DNA, and therefore, in this case, can produce a mutation in the codon that encodes for CUA (Lys) to CUG (Asp)

8 0

3 years ago

Help if good at earth science/ space pls!!

alukav5142 [94]

Answer:

1. The proportion of the universe's galaxies that can be seen from Earth is approximately 10 per cent (option a).

2. The model of galaxy formation in which sections of gas clouds collapse into small pieces which repeatedly combine into larger pieces under the influence of gravity is called the SZ model or the bottom-up model.

3. Most stars are not destroyed in a galaxy collision because galaxies move too slowly for that kind of damage (option c).

4. It is estimated that the galaxies in the universe have evolved since about 13.8 billion years ago, just after the universe first formed (option b).

Explanation:

1. What we can see of the universe is due to distant stellar objects, whose light has reached us. Current estimates indicate that there may be as many as 2 billion galaxies in the entire universe, many of which are not visible.

Using the "Hubble" space telescope would only allow the observation of 200 billion galaxies and study their composition, which represents about 10 per cent of existing galaxies.

In the future, through the use of more powerful and higher resolution telescopes, it would be possible to observe galaxies that cannot be studied so far.

2. Leonard Searle and Robert Zinn proposed, in 1978, a model for the formation of galaxies, in which small units -globular clusters- associated with each other to progressively form larger components.

Globular clusters are the product of the collapse that occurred before galaxies began to form, and are capable of uniting under the effect of gravity to form larger clusters and thus form the galaxy. The name "bottom up" is due to the fact that small elements form larger ones. Likewise, the name "SZ" results from the initials of the scientists who proposed it.

3. Galaxy collisions are a form of gravity-dependent interaction between galaxies, with one having an effect on the other.

The result of the collision of two galaxies, in general, is the fusion of both, where the larger one is capable of absorbing the smaller one .without this involving the destruction of stars- since the movement of the colliding galaxies is very slow.

4. The formation of galaxies has a calculated time of about 13.8 trillion years, about 500 or 600 million years after the Big Bang.

It is believed that the origin of galaxies reside in the gravitational instability induced primitive fluctuations, leading to the formation of dense units from the scattered gases. This condensation of gases is called clusters or superclusters, and galaxies may have formed from them.

3 0

4 years ago