Practice Questions

TLS Online TPP Program

#Question id: 2475

What is a microtubule protofilament?

#Unit 2. Cellular Organization

A microtubule protofilament is a head-to-tail assembly of tubulin dimers. Fourteen such structures compose the cylindrical wall of the microtubule.
A microtubule protofilament is a head-to-tail assembly of actin dimers. Thirteen such structures compose the cylindrical wall of the microtubule.
A microtubule protofilament is a head-to-tail assembly of tubulin dimers. Thirteen such structures compose the cylindrical wall of the microtubule.
A microtubule protofilament is a head-to-tail assembly of actin dimers. Ten such structures compose the cylindrical wall of the microtubule.

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TLS Online TPP Program

#Question id: 11416

#Unit 10. Ecological Principles

Which of the following biomes spans the largest annual mean temperature range, but the narrowest mean precipitation range?

TLS Online TPP Program

#Question id: 32248

#Unit 2. Cellular Organization

The basis for different binding affinity between the KDEL receptor and the KDEL sequence in the ER & golgi is due to:

a. the lower pH in the Golgi

b. the higher pH in the Golgi

c. the lower pH in the ER

d. the higher pH in the ER

TLS Online TPP Program

#Question id: 2813

#Unit 2. Cellular Organization

DNA fingerprinting is a technique based on differences in the

a. length of introns.

b. number of tandem copies of a simple sequence repeat.

c. number of tandem ribosomal RNA genes.

d. size of protein coding genes.

TLS Online TPP Program

#Question id: 19129

#Unit 12. Applied Biology

Physical components in a biosensor include

TLS Online TPP Program

#Question id: 17655

#Unit 13. Methods in Biology

In DNA isolation, for protein free solution what will be the ratio at nm