If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.

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#Question id: 31404

#Unit 7. System Physiology – Animal

Which of the following substances must be digested before being absorbed by the small intestine? 

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#Question id: 16485

#Unit 12. Applied Biology

A modification of the original grid method is widely used to study the 

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#Question id: 23232

#Unit 2. Cellular Organization

In eukaryotes the flagella is made up of which protein?

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#Question id: 18706

#Unit 13. Methods in Biology

Sources of thermostable DNA polymerases with proofreading (3′–5′ exonuclease) activity are given match them correctly

DNA polymerase                          Source

a. Tma                                      i. Thermotoga maritima

b. Deep vent tm                      ii. Pyrococcus furiosus

c. Tli                                      iii. Thermococcus litoralis

d. Pfu                                      iv.  Pyrococcus sp

e. Pwo                                      v. Pyrococcus woesi

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#Question id: 2816

#Unit 2. Cellular Organization

Which of the following mutations can result in a reduction of β-galactosidase?

a. a mutation in adenylate cyclase

b. a mutation in catabolite activator protein (CAP)

c. a mutation in the CAP site in the lac control region

d. a mutation in the repressor binding site in the operator