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TLS Online TPP Program
#Question id: 13197
#Unit 1. Molecules and their Interaction Relevant to Biology
In helical nature of DNA is its periodicity each base pair is displaced (twisted) from the previous one by
TLS Online TPP Program
#Question id: 13196
#Unit 1. Molecules and their Interaction Relevant to Biology
In The Mica Experiment Dnase I enzyme cleaves
TLS Online TPP Program
#Question id: 13195
#Unit 1. Molecules and their Interaction Relevant to Biology
Who contributes to the stability of DNA helix structure?
A. Hydrogen bonding between bases
B. Hydrogen bonding between water and bases
C. Scattering interactions between bases
D. Stacking interactions between bases
CORRECT combination is
TLS Online TPP Program
#Question id: 13194
#Unit 1. Molecules and their Interaction Relevant to Biology
If we have the sequence 5’-ATGTC-3’ on one chain, the opposite chain must have the complementary sequence
TLS Online TPP Program
#Question id: 13193
#Unit 1. Molecules and their Interaction Relevant to Biology
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?
TLS Online TPP Program
#Question id: 10476
#Unit 1. Molecules and their Interaction Relevant to Biology
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?