Practice Questions

TLS Online TPP Program

#Question id: 3866

Which of the following statements about E. coli RNA polymerase (core enzyme) is false?

#Part-A Aptitude & General Biotechnology

In the absence of the B subunit, core polymerase has little specificity for where initiation begins.
he core enzyme contains several different subunits.
The core enzyme has no polymerizing activity until the  subunit is bound.
The RNA chain grows in a 5' -> 3' direction.

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TLS Online TPP Program

#Question id: 12173

#Part-B Specialized Branches in Biotechnology

Female with only one X chromosome is a characteristics of individual with

TLS Online TPP Program

#Question id: 12187

#Part-B Specialized Branches in Biotechnology

How cells know whether sister kinetochores are properly attached to the mitotic spindle?

TLS Online TPP Program

#Question id: 12188

#Part-B Specialized Branches in Biotechnology

The series of events by which APC/C promotes the separation of sister chromatids at anaphase.

A. all the kinetochores have attached to spindle microtubules and the spindle apparatus is properly assembled and oriented.

B. Cdc20 specificity factor associated with APC/C directs it to ubiquitinylate securin and mitotic cyclins.

C. A protease known as separase cleaves the cohesin subunit Scc1 (Rad21), breaking the protein circles linking sister chromatids.

D. anaphase begins as poleward force exerted on the kinetochores moves the split sister chromatids toward opposite spindle poles.

E. Following securin degradation and a decrease in mitotic CDK activity.

Which of the following series is correct?

TLS Online TPP Program

#Question id: 12190

#Part-B Specialized Branches in Biotechnology

CDK activity is modulated by the following proteins:

(a) cyclin, (b) CAK, (c) Wee1, (d) p21. Following protein act as:

I. Inhibitory kinase

II. CKI Family of proteins

III. Activatory kinase

IV. Regulatory subunit

Which of the following is correct?

TLS Online TPP Program

#Question id: 12482

#Part-B Specialized Branches in Biotechnology

The Rb protein has been called the “master brake” of the cell cycle. How the Rb protein acts as a cell cycle brake?

TLS Online TPP Program

#Question id: 12486

#Part-B Specialized Branches in Biotechnology

Which of the following process occur in prometaphase?