Which of the following factors dictates to makes ensure the rotation of the c ring is essentially unidirectional.

TLS Online TPP Program

#Question id: 16139

#Unit 13. Methods in Biology

 Many mouse genes are “tissue-specific,” that is, they are present throughout the body but are expressed in only one of the animal’s many tissue types. (Other mouse genes are expressed throughout the body, or in multiple tissues.) Geneticists can study the regulation of a mouse gene by fusing the gene’s promoter region to the LacZ coding sequence and injecting the construct to create a transgenic mouse. Fusion of the mouse amylase promoter to LacZ yielded a Pamylase-LacZ construct.              

Mice heterozygous for the resulting Pamylase-LacZ  transgene displayed the LacZ expression exclusively in the pancreas. Would you expect homozygotes for the transgene to also display LacZ expression in the pancreas?.

TLS Online TPP Program

#Question id: 5680

#Unit 5. Developmental Biology

In vitro model of species-specific binding shows in figure. Add the bindin particles to a plastic well containing a suspension of eggs. After 2–5 minutes of gentle shaking, the wells were photographed.

 According to this figure, which of the following conclusion correctly define the phenomenon of species specificity?

TLS Online TPP Program

#Question id: 18662

#Unit 13. Methods in Biology

Which of the following method is particularly useful for separating isoenzymes, which are different forms of the same enzyme, often differing by only one or two amino-acid residues.

TLS Online TPP Program

#Question id: 10406

#Unit 6. System Physiology – Plant

Which one of the following photoreceptors is under circadian control and regulates the expression of clock-regulated genes?

TLS Online TPP Program

#Question id: 28485

#Unit 5. Developmental Biology

The cells that make up the limb bud are derived from various cells, except?

a) Trophoblast cells

b) lateral plate mesoderm

c) Blastema cells

d) Somites cell

e) bud’s overlying ectoderm