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3 years ago

Use the words, DNA, chromosome, and gene in a sentence.

Biology

1 answer:

Alona [7]3 years ago

3 0

Answer:

the DNA, chromosome, and gene can all be similar in some way

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Que es desarrollo sostenible

MrRa [10]

Answer:

Sustainable development

Explanation:

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4 years ago

A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and

MAVERICK [17]

Answer:The ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = $K_a=1.8\times 10^{-4}$

Concentration of HA= 0.5 mM

Concentration of $A^-$ = 0.1 mM

pH = 6.16

First we have to calculate the value of $K_a$ .

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[A^-}{[HA]}$

Now put all the given values in this expression, we get:

$6.16=pK_a+\log (\frac{[0.1]}{0.5})$

$pK_a=6.86$

To calculate the ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

$7.02=6.86+\log \frac{[A^-]}{[HA]}$

$\frac{[A^-]}{[HA]}=1.44$

$\frac{[HA]}{[A^-]}=0.69$

Thus the ratio of the concentrations of $HA$ and $A^-$ when the buffer has a pH of 7.02 is 0.69

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3 years ago

Diseases that cause the cell membrane to break/explode

CaHeK987 [17]

answer:

By permeating the cell walls and membranes, organic solvents such as alcohols, ether or chloroform can disrupt cells. These solvents are also used to lyse plant cells, in conjunction with shearing forces,

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3 years ago

4. What are the building blocks of DNA?

Degger [83]

DNA is made of chemical building blocks called nucleotides

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3 years ago

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The most common way of restraining dairy cows is with?

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C. A halter
A halter is the most common way people use to restrain their cows.

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4 years ago

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