What are alleles?

TLS Online TPP Program

#Question id: 2593

#Unit 2. Cellular Organization

How do actin filaments appear when viewed by negative stain electron microscopy?

TLS Online TPP Program

#Question id: 33330

#Unit 2. Cellular Organization

Which of the following structures is NOT typically formed as a result of macromolecular accumulation?

TLS Online TPP Program

#Question id: 10235

#Unit 10. Ecological Principles

Following some observation is correct about species of P, Q and R

A) Species P and R have generalized nich while Q has specialized nich

B) Species P and R have specialized nich while Q has generalized nich

C) Species P and R are more prone to extinct than Q species

D) Species Q is more prone to extinct than either P or R species

TLS Online TPP Program

#Question id: 963

#Unit 1. Molecules and their Interaction Relevant to Biology

________ is hydrolytically cleaved to directly yield urea in the urea cycle.

TLS Online TPP Program

#Question id: 15652

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. You have isolated a mutation that causes constitutive melibiase activity, which you designate MelA–. P1 phage mapping experiments using a Tn5 insertion linked to Mel1 show that MelA– is not linked to Mel1. Moreover you find that when an amber suppressor is introduced into a MelA– mutant, normal melibiase regulation is restored. Classify the MelA– mutation in terms of its basic genetic properties,