a. Hb Cowtown: eliminates an ion pair involved in T-state stabilization

b. Hb Milwaukee: substitutes a Glu for a Val

c. Hb Providence: substitutes an Asn for a Lys that normally projects into the central cavity of the tetramer

d. Hb Philly: substitutes a Phe for a Tyr

Which Hb variant will have changed pI as compared to HbA

TLS Online TPP Program

#Question id: 19084

#Unit 4. Cell Communication and Cell Signaling

ToxA is produced by__

a) Cochliobolus carbonum

b) Stagonospora nodorum

c) Pyrenophora tritici‐repentis

d) fungus Botrytis

Which combination is correct?

TLS Online TPP Program

#Question id: 10349

#Unit 6. System Physiology – Plant

Elevated plastid levels of glutamine stimulate the activity of glutamate synthase (also known as glutamine:2- oxoglutarate aminotransferase, or GOGAT). Given below some of the statements about GOGAT, which one of the following is incorrect?

TLS Online TPP Program

#Question id: 4086

#Unit 3. Fundamental Processes

RNA interference

a. utilizes antisense RNA.  

b. utilizes double-stranded RNA.

c. is used to silence expression of genes. 

d. utilizes short interfering RNAs.

TLS Online TPP Program

#Question id: 32380

#Unit 2. Cellular Organization

Which of the following protein consists almost entirely of a repeating 35-amino-acid actin-binding motif?

TLS Online TPP Program

#Question id: 34174

#Unit 3. Fundamental Processes

Once bound to a primer:template junction, DNA polymerase interacts tightly with much of the double stranded portion of the DNA by