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TLS Online TPP Program

#Question id: 561

Enzyme X exhibits maximum activity at pH = 6.9.  X shows a fairly sharp decrease in its activity when the pH goes much lower than 6.4.  One likely interpretation of this pH activity is that:

#1. Molecules and their Interaction Relevant to Biology

  1. a Glu residue on the enzyme is involved in the reaction.

  2. a His residue on the enzyme is involved in the reaction.

  3. the enzyme has a metallic cofactor.

  4. the enzyme is found in gastric secretions

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TLS Online TPP Program

#Question id: 5687

#8. Inheritance Biology

The error in meiosis that produces a 47,XYY karyotype is best  described by
TLS Online TPP Program

#Question id: 5688

#8. Inheritance Biology

Which of the following are not cause of aneuploidy
TLS Online TPP Program

#Question id: 5691

#8. Inheritance Biology

Which of the following most accurately explains the cause for the abnormal numbers of chromosomes during human reproduction that can result in Down syndrome, Turner’s syndrome, or Klinefelter’s syndrome?
TLS Online TPP Program

#Question id: 5692

#8. Inheritance Biology

Aneuploids can be produced several ways except
TLS Online TPP Program

#Question id: 5693

#8. Inheritance Biology

Type of nondisjunction leads to regions of tissue with different chromosome constitutions, a condition known as mosaicism is due to
TLS Online TPP Program

#Question id: 5694

#8. Inheritance Biology

In anaphase I, the chromosomes separate in  three different ways , which of the following way for chromosome saparation leads to nonviable gamete formation