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2 years ago

Which of the following is TRUE about the electron transport chain (ETC)?

Biology

1 answer:

marta [7]2 years ago

7 0

The following statement is TRUE about electron transport chain

Electrons start out at very high energy and lose energy at each transfer step.

Explanation:

An electron transport chain is a series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons across a membrane.
The electron transport chain is built up of peptides, enzymes, and other molecules
The electron transport chain consists of a series of redox reactions in which electrons are transferred from a donor molecule to an acceptor molecule.
The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that shuttles electrons from NADH and FADH2 to molecular oxygen.
In the process, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.
The underlying force driving these reactions is the free energy of the reactants and products.

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You have a cup of vegetable oil and a vial full of normal phospholipids. What would you predict would happen if you dropped the

Vilka [71]

Answer:

The phospholipid will form a sphere with the heads inside

Explanation:

Phospholipids are glycerol molecules containing two Fatty acids that is hydrophobia and a hydrophillic negatively charged phosphate.

The phosphate forms the head and the two fatty acids will form the tail

When phospholipid is dropped into a cup of vegetable oil (a lipid). The phospholipid will form a sphere with the heads inside. This is because the heads are hydrophillic and cannot dissolve in the fat hence they will cluster together.

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2 years ago

Abandoned farmland that once grew corn is now covered with bushes and small trees. These observed changes resulted directly from

const2013 [10]

I believe the correct answer from the choices listed above is option 2. Abandoned farmland that once grew corn is now covered with bushes and small trees. These observed changes resulted directly from ecological succession. It is the process of change in the species structure of an ecological community over time.

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2 years ago

Sarah performs an experiment to determine the effect of nitrogen on plants. She studies the effect of nitrogen on the growth of

Aneli [31]

When Sarah performed this experiment, she changed the levels of nitrogen in order to observe the changes in the morphological features of the plant.
All of the characteristics of the plant that she observed were dependent on multiple different things, but the level of nitrogen was an independent variable that she was changing at her will.

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2 years ago

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Watch this video about kipunji monkeys in Africa. If you were a conservationist monitoring the populations of these monkeys, wha

bagirrra123 [75]

I would choose to make sure the local people value the forest especially the kipunji monkeys. How I would do that is by convicing them that leaving the forest is more profitable than cutting it down for agriculture use by suggesting that tourists will pay to visit their land. Tourism would boost the economy and value of the land. The local people can make a big profit and save their forest too.

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2 years ago

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In fruit flies, straight wings are dominant and curly wings are recessive. What will the generations look like? Assume that Mend

anzhelika [568]

Answer:

The P generation has straight wings and curly wings.

The F1 generation has all straight wings.

The F2 generation has straight wings and curly wings.

Explanation:

This question involves a single gene coding for wing shape in fruit flies. The allele for straight wings (S) is dominant over the allele for curly wings (s). This means that allele "S" will mask the phenotypic expression of allele "s" in a heterozygous state.

According to the question, the cross follows all Mendel's method of crossing two true breeding parents with opposite traits. Hence, the parent generation (P generation) will be between a truebreeding straight wings parent (SS) and a truebreeding curly wings parent (ss). (See attached image for full cross).

Since the straight wing allele (S) is dominant, all the F1 offsprings will possess straight wings with the genotype: Ss, which is heterozygous.

If this F1 offsprings are self-crossed i.e. Ss × Ss, four possible offsprings in the phenotypic ratio 3 straight wings : 1 curly wing will be produced in the F2 generation. The offsprings will possess the following genotypes: SS, Ss, Ss, and ss.

Offsprings SS, Ss, and Ss will all be phenotypically straight-winged

Offsprings ss will be phenotypically curly-winged.

In overall, this means that P generation has both straight and curly wings (SS and ss), F1 generation has only straight wings (Ss), F2 generation has both straight and curly wings (SS, Ss and ss).

7 0

2 years ago