Diluting

1)a 50ml stock solution of pigelase has a concentration o 10g/ml. How could you make a solution that contained only 0.01g/ml of pigelase. in a final note you cannot use more than 1 ml of water 2) a solution of DNA has a concentration of 2mg/ml. 20 microliter of a 10^-2 (ten to the negative two) dilution of the original solution contains how much dna. 3)a stock solution is 0.7 M and you desire a 5 microM solution. how much should the original stock solution be diluted?

diluting

140 microliters (ul)of a solution containing o.1M NaCl and 60micrograms/ml of DNA is mixed with 50ul of a solution containing 0.02M NaCl and 50ul/ml of DNA. what is the concentration of NaCl and DNA in the mixture? I dont know what to do, i know i should know this by now please help me.

Diluting

1) a biological test pond has a volume of 2500 L and a sulfate concentration of 0.002mM. Two liters of 3M sulfuric acid are added to pond. What is the concentration of sulfate in the test pond? 2) a solution contains the protein insulin at a concentration of 5 mg/ml. You wish to transfer 2 microliters of insulin to another tube. How much of the original solution should be transferred? 3) explain how you would make a 100ml solution of 0.07 M NaCl MW OF NaCl is 58.4

Chromosome number in different body cells

An animal cell has 46 post-mitotic chromosomes in each of its somatic cells. How many chromosomes should be present in the following cells- a) Mature egg, b) 1st polar body, c) Sperm, d) Spermatid, e) Primary spermatocyte, f) Brain cell, g) Secondary oocyte, h) Spermatogonium.

Complimentary sequence prediction

A strand of DNA is found to have the sequence 5′ AACGTACGTAC 3′. What is the sequence of the nucleotides on the 3′, 5′ strand? Determine the sequence of the m-RNA template of the given sequence.