The degree of supercoiling of bacterial DNA is maintained by regulation of the net activity of topoisomerases, I and II.

TLS Online TPP Program

#Id: 837

#Unit 4. Cell Communication and Cell Signaling

Alternaria produces the AAL toxin, which activates a plant cell death program in tomato (Solanum lycopersicum) leaves.

TLS Online TPP Program

#Id: 6374

#Unit 2. Cellular Organization

B-1,6-allolactase is a true inducer of Lac operon which activates Lac ZYA gene expression by inhibiting Lac Repressor

TLS Online TPP Program

#Id: 662

#Unit 3. Fundamental Processes

Telomeres cluster on the nuclear envelope just prior to homologous chromosome synapsis during meiosis.

TLS Online TPP Program

#Id: 9428

#Unit 11. Evolution and Behavior

A- Parental investment is high in females than male

Reason - Eggs are much larger than sperm.

Females are responsible for gestation and lactation.

B - Parental investment is high in males than female - very rare

Male Mormon crickets transfer a protein-containing spermatophore to females during mating. Almost 30% of a male’s body weight is made up by the spermatophore.

C- Parental investment of males is equal to female

Degree of mate choice should be equal between the sexes.

No sexual dimorphism

Present in bird

TLS Online TPP Program

#Id: 9059

#Unit 4. Cell Communication and Cell Signaling

PKA always phosphorylates a serine or threonine residue that is located within the common sequence motif: X-Arg-(Arg/Lys)-X-(Ser/Thr)-Φ