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3 years ago

Which of the following statement about gene mutation is not correct. It:

Biology

1 answer:

belka [17]3 years ago

6 0

Answer:

c) Always results in a change in the protein for which the gene codes

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

$2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)$

$\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]$

= $2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]$

$= -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]$

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

In this question, the enthalpy of formation has positive value and hence the reaction is endothermic in which the heat is released.

3 0

3 years ago

Regulation slowly happens but produces long-lasting effects, whereas _____ regulation quickly takes place with short-term effect

vazorg [7]

Endocrine system regulation slowly happens but produces long-lasting effects, whereas nervous system regulation quickly takes place with short-term effects.

Endocrine system can regulate many things in the body that control the metabolism. The effect shouldn't be instant, but it should be good for long term effect. Nervous system need a much faster reaction because it responsible for "fight or flight" reaction. A slow nervous system will cause the organism caught by predator easier.

4 0

3 years ago

Which statement best describes a property of carbon that makes it particularly suited to forming biological macromolecules?

kirill [66]

Carbon is relatively small. non - bulky atom that shares electrons easily .

Hope this helps!!!

3 0

3 years ago

How are enzymes and substrates related?

vesna_86 [32]

The correct choice is B. The enzyme binds to the substrate. The other choices are incorrect.

6 0

3 years ago

Read 2 more answers

In the genetic disease cystic fibrosis, ducts in several organs become blocked by an excessive production of thick mucus. Althou

Advocard [28]

Answer:

The GIT mucus lining of the GIT serve as a physical barrier to the movement of digested food substances.

The mucus also help to prevent inflammation of the bowels; by reducing or suppressing immune response to inflammation.

In Cystic fibrosis, the blockage of the ducts by the mucus, prevents enzymes from reaching the digestive food substances,. The resulting undigested food substances leads to bloating, pain, cramps, gas, smelly belch, constipation, and smelly stools.

Explanation:

5 0

3 years ago