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2 years ago

Which is in the shape of a double helix?

Biology

1 answer:

Ghella [55]2 years ago

4 0

Deoxyribonucleic Acid, or DNA is in the shape of a double helix

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What do i need to do????????????

Cerrena [4.2K]

Answer: the first one

Explanation: the rest are very wasteful :)

4 0

2 years ago

Help me out please , I’m not sure what to do

Pachacha [2.7K]

Answer:

Interesting assignment. I really hope this helps! -

Explanation:

You are going to use the chart where he graphed the data on his hamster's diet to dissect and identify, the parts of this scientific method.

TIP - try to think of this in a first-person perspective meaning try to think of this as you doing the experiment.

Hope this helped understand this assignment. :)

6 0

2 years 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

3 years ago

Which of the following mutations would most likely affect the offspring of an adult cat?

Ymorist [56]

Answer:

reproductive system

Explanation:

7 0

3 years ago

Read 2 more answers

Genes determine the _________of an individual.

Fiesta28 [93]

Answer:Traits are determined by genes, and also they are determined by the interaction with the environment with genes. And remember that genes are the messages in our DNA that define individual characteristics. So the trait is the manifestation of the product of a gene that is coded for by the DNA.

Explanation:

3 0

2 years ago