Practice Questions

TLS Online TPP Program

#Question id: 11371

Which statement about gram-negative bacteria is correct?

#XL - S Microbiology

Penicillins are the best antibiotics to use against them.
They often possess an outer membrane containing toxic lipopolysaccharides.
Their chromosomes are composed of DNA tightly wrapped around large amounts of histone proteins.
Their cell walls are primarily composed of peptidoglycan

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TLS Online TPP Program

#Question id: 9569

#XL - T Zoology

Certain thermophilic bacteria live in hot springs at temperatures close to the boiling point of water. What challenges do such bacteria overcome successfully?

TLS Online TPP Program

#Question id: 19608

#XL - P Chemistry

The ion which is iso-electronic with CO is —————

TLS Online TPP Program

#Question id: 20118

#XL - P Chemistry

Compounds with high heat of formation are less stable because

TLS Online TPP Program

#Question id: 575

#XL - Q Biochemistry

Which of the following statements is FALSE?

TLS Online TPP Program

#Question id: 3917

#XL - Q Biochemistry

For an RNA hairpin loop to form, the transcribed region of the DNA sequence must __.