Which of the following statement justified that the PMZ in chick is functionally equivalent to the amphibian Nieuwkoop center?

A. The posterior marginal zone produces Wnt8c and that, the PMZ cells secrete Vg1, a member of the TGF-β family.

B. PMZ cells capable of inducing the accumulation of β-catenin

C. PMZ cells secretes BMP, a member of the TGF-β family.

D. PMZ secretes its own Nodal antagonist—the Lefty protein.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 101

#Unit 1. Molecules and their Interaction Relevant to Biology

You have two bottles, each of which contains a white, crystalline substance. Your lab director tells you that one contains lactose and the other sucrose. Your job is to determine which bottle contains which sugar. Which procedure would you use?

TLS Online TPP Program

#Question id: 102

#Unit 1. Molecules and their Interaction Relevant to Biology

 The structure of a disaccharide is shown below. Which statement is correct about following structure?

TLS Online TPP Program

#Question id: 103

#Unit 1. Molecules and their Interaction Relevant to Biology

Lipids may be either hydrophobic or ________.

TLS Online TPP Program

#Question id: 104

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the simplest lipids but they may be a part of or a source of many complex lipids.

TLS Online TPP Program

#Question id: 105

#Unit 1. Molecules and their Interaction Relevant to Biology

Isoprenoids are lipids which neither contain nor are derived from fatty acids and include

A) steroids.

B) waxes.

C) terpenes.

TLS Online TPP Program

#Question id: 106

#Unit 1. Molecules and their Interaction Relevant to Biology

fatty acid designated as 20:0 is ________, while one that is designated 20:3 D5,8,11 is