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How do you make 0.9% Saline from a Sodium chloride solution (5M in H2O)?


Yes or No

Absolute refractory period (ARP) in an action potential (AP) allows summation


. What is the difference between a one-celled organism and a single cell of a multicelled organism?



Within the cell, isocitrate dehydrogenase, an enzyme of the citric acid cycle, is located in the

Describe three hypotheses proposed to account for the decline in cell numbers during the



death phase of a growth curve

Write down an algorithm for MSA. You have three protein Sequences, for

example SEQ 1:MAKYPW, SEQ 2:MKYTW and SEQ 3:MKYVW. Point Out

conserved region by aligning theses sequences.


A colorimeter is an instrument used for chemical analysis by comparing a liquid’s color with standard colors. In an experiment, a scientist used two colorimeters and noted the readings. The first colorimeter showed consistent readings that were five points lower than the actual reading. The second colorimeter provided readings that were the same as the actual reading. Which two statements are implications of these readings?



Destroying the Trojan horse. Penicillin is hydrolyzed and thereby rendered inactive by penicillinase (also known as ?-lactamase), an enzyme present in some resistant bacteria. The mass of this enzyme in Staphylococcus aureus is 29.6 kd. The amount of penicillin hydrolyzed in 1 minute in a 10-ml solution containing 10-9 g of purified penicillinase was measured as a function of the concentration of penicillin. Assume that the concentration of penicillin does not change appreciably during the assay. (How do you use the Michaelis-Menten equation without Vmax or Km?)


Anna is on high school track team and runs the 100-meter sprint. Cristine is on the cross-country team and runs 5-kilometers races. Explain which type os respiration the muscle cells in each runners legs use.