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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:

#I Life Science/ Life Sciences Group – I-V

  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: 4742

#SCPH28 | Zoology

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?
TLS Online TPP Program

#Question id: 11064

#SCPH28 | Zoology

The diagram above shows three different compliance curves (S, T, and U) for isolated lungs subjected to various transpulmonary pressures. Which of the following best describe the relative compliances for the three curves?
TLS Online TPP Program

#Question id: 19222

#SCPH28 | Zoology

Selectable marker, which will eventually be used to detect the presence of the T-DNA inserted into the plant chromosomal DNA, is usually placed next to the
TLS Online TPP Program

#Question id: 27791

#Research Methodology

Real facts can be observed in _________.
TLS Online TPP Program

#Question id: 14129

#SCPH01 Biochemistry

Global alignment is based on ________