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TLS Online TPP Program

#Question id: 34082

Regarding Gram staining and bacterial cell wall characteristics, which statements are correct?

#XL - S Microbiology
  1. Crystal violet stains the thick peptidoglycan layer in Gram-positive bacteria
  2. The outer membrane of Gram-negative bacteria contains lipopolysaccharide (LPS)
  3. Teichoic acids are found in the outer membrane of Gram-negative bacteria
  4. Gram-negative bacteria retain the safranin counterstain
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TLS Online TPP Program

#Question id: 19675

#XL - P Chemistry

What is the correct name for a molecule that has two amino groups in opposing (para) locations around a benzene ring?
TLS Online TPP Program

#Question id: 761

#XL - Q Biochemistry

In a DNA double helix each type of base forms a stable base pair with only one type of base. When bases on an RNA strand are involved in base pairing, which bases can form stable base pairs with more than one type of base?
TLS Online TPP Program

#Question id: 15737

#XL - S Microbiology

The basic event of development in higher organisms is
TLS Online TPP Program

#Question id: 5597

#XL - T Zoology

Mammalian sperm will migrate against the direction of the flow—using CatSper calcium channels (like sea urchin sperm) to sense calcium influx and monitor the direction of the current, this process is known as:
TLS Online TPP Program

#Question id: 347

#XL - Q Biochemistry

A beaker contains 100 milliliters (mL) of NaOH solution at pH = 13. A technician carefully pours into the beaker 10 mL of HCl at pH = 1. Which of the following statements correctly describes the result of this mixing?