Practice Questions

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?

#XL - T Zoology

DNA is chemically more stable and replicates with fewer errors (mutations) than RNA.
Only DNA can replicate during cell division.
RNA is too involved with translation of proteins and cannot provide multiple functions.
DNA forms the rod-shaped chromosomes necessary for cell division.

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TLS Online TPP Program

#Question id: 19669

#XL - P Chemistry

The conversion of trialkyl borane to an alcohol does not require which of the following?

TLS Online TPP Program

#Question id: 19581

#XL - P Chemistry

Producer gas is defined as which of the following mixtures?

TLS Online TPP Program

#Question id: 10825

#XL - T Zoology

What are beltian bodies?

TLS Online TPP Program

#Question id: 2093

#XL - S Microbiology

Which of the following is transmembrane proteins?

TLS Online TPP Program

#Question id: 2363

#XL - Q Biochemistry

Cells lining the respiratory tract contain ______ that help keep the lungs clear of particles.