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TLS Online TPP Program

#Question id: 28267

Resact binds to receptor on sperm, it activates guanylyl cyclase which causes the sperm cell to produce_______

#Unit 5. Developmental Biology
  1. more cGMP, that activates a calcium channel
  2.  activates a sodium channel in the cell membrane of the sperm tail, allowing the influx of sodium ions (Na2+).
  3. activates a calcium channel in the cell membrane of the sperm tail, allowing the efflux of calcium ions (Ca2+).
  4. activates a sodium channel in the cell membrane of the sperm tail, allowing the efflux of sodium ions (Na2+).
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TLS Online TPP Program

#Question id: 24656

#Unit 2. Cellular Organization

What is the “signature sequence” that is highly conserved in all K+ channels?
TLS Online TPP Program

#Question id: 24657

#Unit 2. Cellular Organization

Valinomycin, which is one of the best characterized ionophores, specifically transports
TLS Online TPP Program

#Question id: 24658

#Unit 2. Cellular Organization

Each monomer of aquaporin1 has six transmembrane helical segments and two shorter helices, both of which contain the sequence:
TLS Online TPP Program

#Question id: 24659

#Unit 2. Cellular Organization

Which two organelles are responsible for producing phospholipids and sphingolipids?
TLS Online TPP Program

#Question id: 24660

#Unit 2. Cellular Organization

Which of the following transporters cause antibiotic resistance in pathogenic microbes such as Pseudomonas aeruginosa, Staphylococcus aureus, Candida albicans, Neisseria gonorrhoeae, and Plasmodium falciparum?
TLS Online TPP Program

#Question id: 24661

#Unit 2. Cellular Organization

 Indicate whether the following compounds are likely to cross a membrane by nonmediated or mediated transport: (a) ethanol, (b) glycine, (c) cholesterol, (d) ATP.