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TLS Online TPP Program

#Question id: 4949

What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?

#SCPH06 I Botany

  1. DNA is chemically more stable and replicates with fewer errors (mutations) than RNA.

  2. Only DNA can replicate during cell division.

  3. RNA is too involved with translation of proteins and cannot provide multiple functions.

  4. DNA forms the rod-shaped chromosomes necessary for cell division.

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TLS Online TPP Program

#Question id: 679

#SCPH05 I Biotechnology

b sandwich forms when
TLS Online TPP Program

#Question id: 4919

#SCPH12 I Genetics

Genes for cytoplasmic male sterility in plants are generally located in
TLS Online TPP Program

#Question id: 5014

#SCPH06 I Botany

 Following geological time period and major evolutionary event?

I. Devonian                            A. Gymnosperms dominant

II. Jurassic                               B. Amphibians diversify; first reptiles

III. Carboniferous                  C. Mammals appear

IV. Triassic                           D. Seed plants appear
TLS Online TPP Program

#Question id: 1539

#SCPH05 I Biotechnology

Regulatory T cell (TREG) have identified by the presence of
TLS Online TPP Program

#Question id: 105

#SCPH05 I Biotechnology

Isoprenoids are lipids which neither contain nor are derived from fatty acids and include

A) steroids.

B) waxes.

C) terpenes.