Which one statement best describes gastrulation in sea urchins?

a) Gastrulation is initiated by invagination of the micromeres at the vegetal pole.

b) The mouth of the pluteus larva will form from mesomeres on the oral side of the 60-cell embryo.

c) The gut will form from the macromeres at the 16-cell stage.

d) Mesenchymal cells originating at the vegetal pole will invaginate first during gastrulation and will form skeletal structures in the pluteus larva.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 1072

#Unit 4. Cell Communication and Cell Signaling

After growth in tissue culture, the infected cells lyse and the virus may be harvested from

TLS Online TPP Program

#Question id: 32356

#Unit 1. Molecules and their Interaction Relevant to Biology

For given plot of hexokinase

 

a. i is representing Hexokinases IV

b. ii is representing Hexokinases I, II, and III

c. i is representing Hexokinases I, II, and III

d. ii is representing Hexokinases IV

Choose the correct option

TLS Online TPP Program

#Question id: 442

#Unit 1. Molecules and their Interaction Relevant to Biology

Levels of ATP and ADP are partly maintained in cells by

TLS Online TPP Program

#Question id: 18923

#Unit 13. Methods in Biology

lacZ' gene present in a Puc series plasmid codes for which of the enzyme?

TLS Online TPP Program

#Question id: 20408

#Unit 3. Fundamental Processes

Mutations occur at the same rate in both exons and introns, but 

a) If unwanted mutations occur at exons they are conserved more effectively by selection

b) Exons are negatively selected when undergo mutation

c) Introns may more freely accumulate point substitutions and other changes due to no selection pressure. 

d) exon mutations are eliminated more effectively by selection.

Which of the above is true regarding introns and exons