Trypan blue staining can be used to discriminate between viable and dead cells and determine the number of viable cells present in a cell suspension.
https://www.creative-bioarray.com/support/trypan-blue-staining-assay.htm
Answer:
33%.
Explanation:
The 4% population is red-hair due to the recessive mutation in melanocortin 1 receptor (MC1R).
Since, the population is in Hardy-Weinberg equillibrium- laet the frequency of recessive allele with red - hair is 'q' and the frequency of dominant allele in the population is 'p'.


q=0.2
According to hardy-weinberg equillibrium
(p+q)=1
p=1-q
p=1-0.2
p=0.8.
The total population with non red hair is calculated by
=
= 0.64 + 0.32
= 0.96
The percentage of the population with non red headed carrier for MC1Rr is calculated by:
=0.32/0.96*100
=33%
Thus, the correct answer is (B).
The answer: THE PASSOVER SEDER
The passover seder is a Jewish ritual feast that marks the beginning of the Jewish holiday of Passover all over the world on the 15th day of Nisan in the Hebrew calendar (late March or April).
<span>The Seder ceremony is full of symbolism, with the aim of reminiscing about times of slavery and liberation.</span>
Answer:
D.) Amino Acids
Explanation:
Please see picture attached to this answer.
Answer:
Reverse translate from amino acids (protein) to RNA then reverse transcribe to DNA. However, its not exact because there are no introns because they got cut out because they didn't code for the protein so you can't get the original strand and also because some amino acids have multiple codons.