What kind of pairing configuration would be seen in prophase of meiosis I in (a) an inversion homozygous, (b) a translocation heterozygote?

TLS Online TPP Program

#Question id: 15653

#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 on the basis of genetic properties,  make a proposal for the type of regulatory functions affected by the MelA– mutation?

TLS Online TPP Program

#Question id: 3675

#Unit 3. Fundamental Processes

Which describes the role of primase during replication?

TLS Online TPP Program

#Question id: 28874

#Unit 4. Cell Communication and Cell Signaling

Wnt is a combination of which proteins?

TLS Online TPP Program

#Question id: 33521

#Unit 2. Cellular Organization

Operationally, we usually consider that two genes are orthologs if 

TLS Online TPP Program

#Question id: 24223

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphoglycerate mutase catalyses a reversible shift of the phosphoryl group between C-2 and C-3 of glycerate; which of the following ion is essential for this reaction