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3 years ago

6

Which human activity will help decrease air pollution? A. burning crops B. burning household garbage C. driving a hybrid car D.

using coal to produce energy

1 answer:

Alex_Xolod [135]3 years ago

5 0

D. using coal to produce energy

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The movement of perfume from a vial until it randomly disperses throughout the room is an example of

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This movement is called diffusion

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3 years ago

A woman gives birth to a set of fraternal twins: a girl and a boy. She also passes on a color-blindness gene. Which of the child

Eva8 [605]

b. the male is more likely

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3 years ago

This secretes digestive enzymes and buffers which neutralize the stomach acids

Effectus [21]

The pancreas is the organ that releases most of the digestive enzymes needed for chemical digestion. Since the food is entering from the stomach, much of the enzymes are alkaline to neutralize the acid & protect the small intestines.

Hope this helps!

6 0

4 years ago

Explain why vestigial organs are not “left-overs” of evolution (3 points)

nasty-shy [4]

<u>Answer</u>:

Vestigial organs are those organs that were present in the past ancestors but absent in their present generations. Vestigial organs are not leftover of evolution because they are evolved to perform a different function.

<u>Explanation</u>:

For example, an appendix is considered as a vestigial organ but it helps in storing good bacteria and plays a vital role in the immune system. These vestigial organs are the product of changing the environment and adaptation to the changing environment. Due to natural selection some specific traits have been passed down to generations which helped the animals to survive in those conditions. The other examples of vestigial organs are wisdom teeth coccyx, tonsils, several genes in the chromosomes and our hair.

3 0

4 years ago

The TCA cycle in a particular tissue has been inhibited by fluoroacetate. However, it is not the fluoroacetate that is responsib

denis23 [38]

Answer:

TCA cycle in particular is inhibited by fluoroacetate. Fluoroacetate is a compound the binds to the Coenzyme A of the Krebs cycle to form Floroacetyl CoA which in turn forms fluorocitrate instead of forming citrate. This fluorocitrate is not able to bind to aconitase enzyme preventing the conversion in to isocitrate, thereby halting the Krebs cycle.

a) The inhibitor molecule here is Fluorocitrate.

t a Coa-sa Co ASH Coenzyme A Fro Nat Fluoroacetate Fluoroacetyl COA Citrate Hooc-ch-F Hooc-c-one Hooc-ch, Fluoro citrate

b) see attachment below

c) The fluoroacetate along with Coenzyme A forms Fluoroacetyl CoA which in turn forms Fluorocitrate in place of citrate formation. Fluorocitrate does not bind to Aconitase hance isocitrate is not formed and the Krebs cycle in halted.

See attached file for the continuation of c.

The above mechanism shows the inhibition of aconitase, where the presence of fluorine causes resonance to occur after the flip step preventing the Ser 642 moiety of Aconitase from binding and no isocitrate conversion.

d) As compared to the normal tissues the, due to the inhibition of aconitase enzyme, the citrate isocitrate conversion will proceed at a very slow rate thereby halting TCA cycle and the concentrations of the further produced components:

Citrate concentration increased

Isocitrate concentration reduced

Alpha - ketoglutarate concentratioin reduced

Succinyl CoA concentration reduced

Succinate concentration reduced

Fumarate concentration reduced

Malate concentration reduced

Oxaloacetate concentration reduced

7 0

3 years ago