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sweet [91]
2 years ago
11

What kind of molecules dissolve easily in water? What types do not dissolve easily in Water?

Biology
1 answer:
dusya [7]2 years ago
4 0

Polar molecules (with +/- charges) are attracted to water molecules and are hydrophilic. Nonpolar molecules are repelled by water and do not dissolve in water; are hydrophobic.

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Assume that you have 1 mL of a solution of amylase (an enzyme) at a concentration of 15 mg protein/mL. Calculate the volume of d
lidiya [134]

Answer:

42,5 mL

Explanation:

We need to use the serial dilution formula beacuse we start with a stock concentrate solution and we need to prepare a new less concentrated one.

DF=\frac{Vi}{Vf}

<u>DF in the dilution factor, Vi is the initial volume and Vf is the final volume.</u>

The first step is to have the same measurment unit so we need to convert 345 µg to mg.

we know that 1 µg equals 0,001 g, hence:

345 µg = 0,345 mg

now the final volume is 0,345 mg  protein/ mL and the inital volume is 15mg protein/mL, both of them are in the same unit so we can use the formula

DF= \frac{15mg protein/mL}{0.345mg protein/mL}

DF= 43,5 mg protein/ mL

Now since the question said that we already have 1.0mL of the amylase stock solution we need to subtract that 1.0mL to the 43,5 mg protein/mL

43,5mL-1,0mL = 42,5 mL

So, we need 42,5 mL of diluting buffer if we want a final concentration of 345 µg protein/mL (0.345 mg protein/mL)

8 0
3 years ago
The recommended diet for soldiers in Arctic conditions is different from the recommended for tropical conditions. What important
Dominik [7]

Food and nutrition are fundamental to military capability. Historical examples demonstrate that a failure to supply adequate nutrition to armies inevitably leads to disaster; however, innovative measures to overcome difficulties in feeding reap benefits, and save lives. In barracks, UK Armed Forces are currently fed according to the relatively new Pay As You Dine policy, which has attracted criticism from some quarters. The recently introduced Multi-Climate Ration has been developed specifically to deal with issues arising from Iraq and the current conflict in Afghanistan.Answer:

Explanation:

#if u need any queshtions answered within secs/mins hit me up and I gotchu

8 0
3 years ago
What is produced inside the nucleus during transcription that make it possible to move genetic information outside the nucleus?
Aleksandr [31]

Answer:

b

Explanation:

mRNA transcript

3 0
3 years ago
Read 2 more answers
4. Which of the following are extra senses that vertebrates may have? (Choose all that apply)
ludmilkaskok [199]

Answer:

all of them apply to some vertebrates

magnetoreception

proprioception

baroception

nociception

7 0
3 years ago
The fluctuation of the water level in the small arm of the water seal with respirations is called:_________
mr Goodwill [35]

Answer: Tidaling

Explanation:

It is rise and fall of water in water-seal chamber, used to determine the degree of re expansion of the lungs. It reduction shows the lungs reexpands.

However, with respiratory efforts it is normal.

4 0
3 years ago
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