Burning fossil fuels releases oxides of sulfur and nitrogen. These air pollutants can be responsible for ________.

#Question id: 562

#SCPH05 I Biotechnology

Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme.  This is an example of what kind of inhibition?

#Question id: 10527

#SCPH05 I Biotechnology

Based on their feeding behaviors, three major types of insect herbivores can be distinguished, which evades the constitutive defense;

A) Phloem feeders                                                                    i) caterpillars, grasshoppers, and beetles

B) Cell-content feeders                                                            ii) aphids and whiteflies

C) Chewing insects                                                                    iii) mites and thrips

Correctly match the feeding behaviour with its insects;

#Question id: 6964

#SCPH06 I Botany

If embryos are disaggregated with chemicals or proteases, and the individual cells are mixed together in culture, what will happen?

#Question id: 4154

#SCPH01 Biochemistry

How many possible codons (of normal size) are possible using the bases found in DNA?

#Question id: 1121

#SCPH01 Biochemistry

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?