Practice Questions

TLS Online TPP Program

#Question id: 12576

Estimates of current rates of extinction

#Unit 10. Ecological Principles

Indicate that we have reached a state of stable equilibrium in which speciation and extinction rates are approximately equal.
Suggest that one-half of all animal and plant species may be gone by the year 2100.
Indicate that rates may be greater than the mass extinctions at the close of the Cretaceous period.
Indicate that only 1% of all of the species that have ever lived on Earth are still alive.

More Questions

TLS Online TPP Program

#Question id: 27506

#Unit 2. Cellular Organization

A DNA with a initial LK no = 100 is change to 95

TLS Online TPP Program

#Question id: 27505

#Unit 2. Cellular Organization

Which of the amino acid residue are found in active site of topoisomerases

TLS Online TPP Program

#Question id: 27504

#Unit 2. Cellular Organization

Which kind of catalysis are used by the topoisomerases

TLS Online TPP Program

#Question id: 27503

#Unit 2. Cellular Organization

Bacterial DNA are atchitected in form of loop sized with

TLS Online TPP Program

#Question id: 26483

#Unit 2. Cellular Organization

lac repressor binds to

TLS Online TPP Program

#Question id: 26481

#Unit 2. Cellular Organization

Which of the following are the characteristics of prokaryotic operator O1

a. Made up of 21-bp sequence

b. It has twofold/dyad symmetry

c. Recognized by two subunits of Lac repressor

d. On each O1 four unit of Lac repressor binds