TLS Online TPP Program

#Question id: 372


Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. slightly acidic

  2. slightly basic 

  3. same as pure water

  4. depends on the altitude where rain drops are formed

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TLS Online TPP Program

#Question id: 5760

#Unit 8. Inheritance Biology

The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that

TLS Online TPP Program

#Question id: 5761

#Unit 8. Inheritance Biology

E. coli cells were spread on an agar plate, producing 1000 colonies.  The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics.  All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin.  You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position.  This demonstrates

TLS Online TPP Program

#Question id: 5762

#Unit 8. Inheritance Biology

An individual cell homozygous for a mutant allele of the gene for a human enzyme contains no detectable activity for that enzyme. The mutation is best described as

TLS Online TPP Program

#Question id: 5763

#Unit 8. Inheritance Biology

A mutation that causes a mutant phenotype only under restrictive conditions

TLS Online TPP Program

#Question id: 5764

#Unit 8. Inheritance Biology

A wild-type chromosome can be represented as ABC * DEFGH, and from this a chromosomal aberration arises that can be represented AFED * CBGH. This is known as (* = centromere)

TLS Online TPP Program

#Question id: 5765

#Unit 8. Inheritance Biology

How many different trisomics could be formed in a plant with a diploid number of 12?