||Homework Help||Kindergarten-University. - Page 55

1. What should be the end result when DNA fragments containing two or more genes of the same family with high homology to each other are

digested briefly with DNase I,

medium-size fragments are selected after size fractionation

PCR amplified for about 30 cycles after adding only two terminal primers from the 5' and 3' ends of the genes

a. nothing should happen because PCR primers for the small fragments were not added to the reaction mixture

b. full-length reshuffled DNA among the genes will be established

c. gene fragments will cross-prime each other resulting in inhibition of the PCR reaction

d. the fragments will randomly ligate and form concatemers

e. DNase I will degrade all single stranded DNA and only small fragments of double stranded DNA will remain

Originally posted by: akhl

the speed of sound in water is 4.3 times the speed of sound in air. A whistle produces a sound wave in air with a frequency f when this sound wave enter the water, what does the frequency becomes?

Originally posted by: Miggi

the speed of sound in water is 4.3 times the speed of sound in air. A whistle produces a sound wave in air with a frequency f when this sound wave enter the water, what does the frequency becomes?

Originally posted by: Miggi

Q: a geological survey ship mapping the floor of the ocean sends sound pulses down from the surface and measured the time taken from the echo to return. how deep is the ocean at a point where the echo point is 8.13s? Use 1500m/s for the speed of sound in sea water, which is a reasonable average for the situation at land.

Originally posted by: Miggi

Q An auditorium has organ pipes at the front and at the rear of the hall. Two identical pipes one at the front and one at the back, have fundamental frequencies of 274Hz, at 20 degree C.during a performance the organ pipes at the back of the hall are at 27.2 degree C while those at front are 22 degree C. what is the beat frequecy when the two pipes sound simultaneously?