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TLS Online TPP Program

#Question id: 11371

Which statement about gram-negative bacteria is correct?

#Unit 9. Diversity of Life Forms
  1. Penicillins are the best antibiotics to use against them.
  2. They often possess an outer membrane containing toxic lipopolysaccharides.
  3. Their chromosomes are composed of DNA tightly wrapped around large amounts of histone proteins.
  4. Their cell walls are primarily composed of peptidoglycan
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TLS Online TPP Program

#Question id: 4192

#Unit 3. Fundamental Processes

At the end of the initiation step, the ribosome has a vacant
TLS Online TPP Program

#Question id: 5732

#Unit 8. Inheritance Biology

Consider a plant, such as maize, heterozygous for a paracentric inversion. The inversion is very small and a synapsed inversion loop does not occur in any of the cells. Which of the following statement is correct?
TLS Online TPP Program

#Question id: 7276

#Unit 5. Developmental Biology

The cells that make up a tetrapod limb arise from three developing tissues:

The ____a______ will provide skeletal precursors to the limb.

The _____b____ will provide muscle precursors to the limb.

The _____c____ will provide the skin of the limb.

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

#Question id: 23666

#Unit 13. Methods in Biology

Which is not necessary as part of an expression vector used in E. coli?
TLS Online TPP Program

#Question id: 12059

#Unit 7. System Physiology – Animal

A 19-year-old man is fed intravenously for several weeks following a severe automobile accident. The intravenous feeding leads to atrophy of the gastrointestinal mucosa most likely because the blood level of which of the following hormones is reduced?