A radioactive isotope decays at a rate proportional to the amount of isotope present. If the concentration of isotope is C (mg l^-I), its rate of decay is:

                                                                    

A solution of the isotope ³²p is used to radioactively label DNA for hybridisation studies. The half-life of ³²p is 14.3 days. According to institutional safety requirements, the solution cannot be discarded until the activity is 1% its present value. How long will this take?____________________

#Question id: 3577

#Section 3: Genetics, Cellular and Molecular Biology

Which is the most correct description of a dominant trait?

#Question id: 1896

#Section 2: General Biology

The single best description of an allergen is that it is:

#Question id: 14983

#Section 6: Plant, Animal and Microbial Biotechnology

#Question id: 9592

#Section 2: General Biology

The function of light is to excite a specialized chlorophyll in the reaction centre either by Direct absorption or more frequently, via energy transfer from an antenna pigment, This excitation process can be envisioned as

a.) An electron from the lowest-energy filled orbital of the chlorophyll to the highest-energy unfilled orbital

b.) An electron in the upper orbital is only tightly bound to the chlorophyll and is difficult to fetch the electron nearby molecules

c.)  The electron in the upper orbital is only loosely bound to the chlorophyll and is easily lost if a molecule that can accept the electron is nearby

d.) The promotion of an electron from the highest-energy filled orbital of the chlorophyll to the lowest-energy unfilled orbital

Which combination is CORRECT?

#Question id: 3284

#Section 3: Genetics, Cellular and Molecular Biology

The fitness of three genotype are A1A1 < A1A2 = A2A2) Which of the following observation correct?