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TLS Online TPP Program

#Question id: 20963

For a homology search program such as BLAST, which one of the following best describes the scoring pattern?

#Unit 11. Bioinformatics
  1. identical residue = 10 pts, conservative substitution = 5 pts, gap = 0 pts
  2. identical residue = 10 pts, conservative substitution = 1 to 9 pts, gap = -3 pts
  3. identical residue = 10 pts, conservative substitution = 1 to 9 pts, gap = 0 pts
  4. identical residue = 10 pts, conservative substitution = 10 pts, gap = -3 pts
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TLS Online TPP Program

#Question id: 10321

#Unit 1. Structure and Function of Biomolecules

The human blood groups (O, A, B) are determined in part by the oligosaccharide head groups of these glycosphingolipids. Which of the following is correct?
TLS Online TPP Program

#Question id: 10473

#Unit 1. Structure and Function of Biomolecules

Cleavage of beta-carotene by BCMO1 yields two molecules of :
TLS Online TPP Program

#Question id: 10474

#Unit 1. Structure and Function of Biomolecules

Lipids differ from other large biological molecules in that they
TLS Online TPP Program

#Question id: 10475

#Unit 1. Structure and Function of Biomolecules

During the formation of a blood plasma protein The aromatic ring of vitamin K undergoes:
TLS Online TPP Program

#Question id: 10476

#Unit 1. Structure and Function of Biomolecules

Following statements are regarding to gangliosides.

A. They are ceramides with attached oligosaccharides that include at least one sialic acid residue.

B. They are ceramides with attached oligosaccharides that include at least one phasphatidic acid residue.

C. Sialic acid gives gangliosides the negative charge at pH 7 that distinguishes them from globosides.

D. Gangliosides are primarily components of cell-surface membranes and constitute a significant fraction (6%) of brain lipids.

Which of the following combination is correct?
TLS Online TPP Program

#Question id: 13193

#Unit 1. Structure and Function of Biomolecules

Data, collected from DNAs of a great many different species, led Chargaff to the following conclusions:
A. The base composition of DNA generally varies from one species to another.
B. DNA specimens isolated from different tissues of the same species have the different base composition.
C. The base composition of DNA in a given species changes with an organism’s age, nutritional state, or changing environment.
D. In all cellular DNAs, the sum of the purine residues equals the sum of the pyrimidine residues.
Which of the above statements are INCORRECT regarding Chargaff’s rule?