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3 years ago

Main type of carbohydrate in rice?

Biology

1 answer:

Oduvanchick [21]3 years ago

6 0

Answer:

the answer is actually polysaccharide

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Who proposed biology to be studied as a single subject?

pishuonlain [190]

Answer:

Isaac Newton

Explanation:

아이작 뉴턴

kamsahamnida

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1 year ago

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

2 years ago

2 things that can cause a cell to lose its ability to regulate its cell cycle properly

Sveta_85 [38]

Answer:

Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor. hope this helps

Explanation:

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2 years ago

How does dna code for specific proteins within a cell

svetlana [45]

Answer:

Genetic code refers to the instructions contained in a gene that tell a cell how to make a specific protein. Each gene’s code uses the four nucleotide bases of DNA: adenine (A), cytosine (C), guanine (G) and thymine (T) — in various ways to spell out three-letter “codons” that specify which amino acid is needed at each position within a protein.

Explanation:

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9 months ago

The period directly following the action potential is known as?

bearhunter [10]

I’m pretty sure it’s the refractory period!!
Hope this helps!

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2 years ago