TLS Online TPP Program

#Question id: 150


How do the pKa values of an ionizable side chain compare when the amino acid is free versus when it is in a polypeptide chain?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. The pKa of the side chain is independent of whether the amino acid is in a polypeptide chain or is free.

  2. The pKa of the side chain is always lower for the free amino acid.

  3. The pKa of the side chain may be lower or higher in a polypeptide chain due to weaker inductive effects and differences in their microenvironments.

  4. The pKa of the side chain is usually higher in a polypeptide chain due to stabilization from nearby residues in the three-dimensional structure.

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TLS Online TPP Program

#Question id: 4923

#Unit 8. Inheritance Biology

following statement given for Genetic maternal effect are correct?

A- Characteristics are determined by nuclear gene

B- Inherited according to Mendel’s principles

C- In F3 generation, segregation of Dominant trait and recessive trait in ratio of 3:1

D) No Segregation of Trait in F2 generation 

TLS Online TPP Program

#Question id: 4924

#Unit 8. Inheritance Biology

Following statement given for a character

A- Characteristics based on autosomal genes

B- Biparntal inheritance

C-pattern of gene expression depend on parental origin

Which of the following having above statements feature?

TLS Online TPP Program

#Question id: 4925

#Unit 8. Inheritance Biology

The pedigree in Figure shows the transmission of a trait in a particular family. Based on this pattern of transmission, the trait is most likely

TLS Online TPP Program

#Question id: 4926

#Unit 8. Inheritance Biology

Shell coiling in snail is determined by genetic maternal effect for a single loci having D allele for dextral coiling but S allele for sinistral coiling. D dominant over S. which of the following cross would produced all progeny that is dextral coiling ?

I- DD Male X SS female

II- DD Male X DS female

III- SS Male X DD female

IV - DS Male X DS female

TLS Online TPP Program

#Question id: 4927

#Unit 8. Inheritance Biology

following cross were allowed

I-Recessive phenotype female X Dominat phenotype male = all recessive phenotype

II-Recessive phenotype male X Dominat phenotype female = all dominant phenotype

Which of the following conclusion?

TLS Online TPP Program

#Question id: 4928

#Unit 8. Inheritance Biology

A certain kind of snail can have a right-handed direction of shell coiling (D) or left handed coiling (d). If direction of coiling is due to a protein deposited by the mother in the egg cytoplasm, then a Dd egg-producing snail and a dd sperm-producing snail will have offspring of which genotype(s) and phenotype(s)?