There is no vaccine to prevent the disease caused by Trypanosoma gambiense. The inability to create a vaccine is due to antigenic variation. Which of the following statements best describes antigenic variation? Group of answer choices Expression of different protein coats. Expression of different protein coats in response to pressure from the host immune system Expression of different protein coats in response to the vector immune system Antigenic variation doesn’t exist. This is an excuse used by pharmaceutical companies to avoid developing new vaccines for lower income countries
Added by Pamela C.
Step 1
This makes it difficult for the immune system to recognize and target the pathogen, and also complicates the development of vaccines. The answer choices provided are: Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 61 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Several different types a vaccines have been made to immunize people against infection by the new coronavirus. One category of vaccines are called Messenger RNA (mRNA) vaccines. These vaccines contain nothing except the Messenger RNA for just one of the proteins that the novel coronavirus makes. Specifically, a protein called the spike protein which is on the outside of the coronavirus particle. This is one of the proteins that your immune system responds to when you become infected by the coronavirus. Considering this information, which of the following is true? A. The vaccine Messenger RNA use translated into a protein by the coronavirus ribosomes B. The vaccine Messenger RNA must be transported into the nucleus before it can be translated C. The vaccine Messenger RNA has a ribosomal binding site near its three prime end D. The vaccine Messenger RNA has a ribosomal binding site near its five prime end E. The vaccine Messenger RNA is transcribed into a protein by your ribosomes
Madhur L.
Which statement best explains how mutations change the shape of flu virus antigens, preventing the attachment of antibodies? A. Mutations change the nucleotide sequence of the gene, resulting in a different arrangement of amino acids. B. Mutations change the amino acid sequence of the protein, resulting in a change in the nucleotide sequence C. Mutations cause overproduction of new antigens on the surface of the virus. D. Mutations allow for the exchange of antigens among virus species.
Sri K.
Which of the following statements best describes vaccines? a. Vaccines kill viruses. b. Vaccines stimulate an immune response against future infections. c. Vaccines inhibit the virus by blocking the action of key viral proteins. d. Vaccines control and reduce symptoms.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD