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TLS Online TPP Program

#Question id: 11396

Carl Woese and collaborators identified two major branches of prokaryotic evolution. What was the basis for dividing prokaryotes into two domains?

#XL - S Microbiology
  1. microscopic examination of staining characteristics of the cell wall
  2. metabolic characteristics such as the production of methane gas
  3. metabolic characteristics such as chemoautotrophy and photosynthesis
  4. genetic characteristics such as ribosomal RNA sequences
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TLS Online TPP Program

#Question id: 5746

#XL - R Botany

A base change resulting in a codon specifying an amino acid which is different than in the wild-type polypeptide
TLS Online TPP Program

#Question id: 2065

#XL - S Microbiology

Which of the following are least likely to diffuse through the phospholipid bilayer of a cell membrane?
TLS Online TPP Program

#Question id: 3025

#XL - S Microbiology

Penicillin is an antibiotic that inhibits enzymes from catalyzing the synthesis of peptidoglycan, so which prokaryotes should be most vulnerable to inhibition by penicillin?
TLS Online TPP Program

#Question id: 20170

#XL - P Chemistry

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at
TLS Online TPP Program

#Question id: 80

#XL - T Zoology

 Examine the Fischer projection below. How is this carbohydrate classified