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dolphi86 [110]
3 years ago
11

Which of the following is NOT a part of a DNA molecule?

Biology
2 answers:
mina [271]3 years ago
8 0

Answer:

D.Amino acid

Explanation:

DNA is made of nucleotides. Each nucleotide contains a nitrogenous base a phosphate group and a 5 carbon sugar(deoxyribose)

almond37 [142]3 years ago
6 0

Answer:

Explanation:

a sugar, a phosphate group, and a nitrogenous base.

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Which techniques should be followed when putting on​ gloves?
Greeley [361]
Hold gloves by the edge
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4 years ago
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
4 years ago
Which term refers to genetic changes which give their carriers a better chance to survive and reproduce than individuals without
spayn [35]
The term is natural selection. 
4 0
3 years ago
2. Members of this kingdom secrete enzymes into their food then absorb the digested matter
Fudgin [204]

Answer:

Fungi

Explanation:

Fungi are an example of saprotrophs i.e. organisms who live and feed on dead organic matter. Saprotrophic nutrition is described as chemoheterotrophic extracellular digestion. It involves the extracellular release of digestive enzymes on the organic matter. The enzymes break down the organic matter into a simpler form, which is then absorbed by the fungus.

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Name two types of evidence scientists use to support the theory of evolution.
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Fossil evidence, and biographical evidence.
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2 years ago
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