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TLS Online TPP Program

#Question id: 1704

The single best unique description of the interaction of the αβ T-cell receptor with peptide-MHC is that it:

#XL - Q Biochemistry

  1. Involves non-covalent forces

  2. Results in T-cell activation

  3. Requires the peptide to be presented by MHC class I

  4. Involves CDR (complementarity-determining region) binding to both peptide and MHC

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TLS Online TPP Program

#Question id: 17281

#XL - S Microbiology

Identify each of the following structures as haploid or diploid: 
A) sporophyte 
B) spore 
C) gametophyte 
D) zygote 
E) Sperm
TLS Online TPP Program

#Question id: 184

#XL - T Zoology

What is the approximate charge difference between glutamic acid and alpha-ketoglutarate at pH 9.5?
TLS Online TPP Program

#Question id: 342

#XL - S Microbiology

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by ________.
TLS Online TPP Program

#Question id: 1116

#XL - Q Biochemistry

What is a primary function of transcription factors?
TLS Online TPP Program

#Question id: 5241

#XL - S Microbiology

Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?