The first step in treating water from a river or lake is usually

Biology

2 answers:

lozanna [386]2 years ago

4 0

I believe filtration is the first step in treating lake water.

Hope this helps!!

allsm [11]2 years ago

3 0

step on is filtration

step two is coagulation

step three is settling basins

step four is filtration again

step five is chlorination

step six is aeration

and lastly step seven is softened

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List the five classes of antibody heavy chains and provide one function for each.

Lesechka [4]

Answer:

IgM, IgA, IgE, IgD and IgG

Explanation:

IgM functions in the initial response to offence.

IgA is important for protection of mucus membranes such as in saliva, sweat, tears and gastric fluid.

IgE is active during allergic reactions and defense against infections.

IgD is found on the surface of lymphocytes and is activated upon contact with antigens.

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2 years ago

What piece of information is NOT stored in an offender's CODIS DNA profile?

vazorg [7]

Here is what I found, its quite interesting, I hope it helps..

https://www.fbi.gov/services/laboratory/biometric-analysis/codis/codis-and-ndis-fact-sheet

3 0

3 years ago

A strand of DNA that is 36 nucleotides long codes for how many amino acids?

Margarita [4]

Answer:

See answer below

Explanation:

Hi there,

Assuming this DNA strand is fully capable of being mature mRNA (5' m7G cap and PolyA tail), nucleotides lead to an mRNA codon, which is 3 nucleotides per codon. In turn, 1 codon leads to 1 amino acid. However, as a single strand, it must be capable of terminating translation, which always requires a stop codon, and thus 3 nucleotides. Hence, we must subtract this from the total amount of codons <em>first</em>.

$36 \ ncltd \ \frac{1 \ codon}{3 \ ncltd} = 12 \ codon\\12 \ codon - 1 \ codon \ = 11 \ codon\\11 \ codons\ \frac{1 A.A.}{1 \ codon} = 11 \ A. A.$