Hyaluronic acid is an important glycosaminoglycan component of connective tissue. Hyaluronate molecules are composed of

A. D-glucuronic acid and N-acetyl-D-glucosamine

B. D-galactose and N-acetyl-D-glucosamine

C. β(1→4) and β(1→3) alternate linkages

D. β(1→4) and β(1→6) alternate linkages

Which of the above 2 combinations are correct

TLS Online TPP Program

#Question id: 15780

#Unit 5. Developmental Biology

In drosophila, the somatic cells of the hub are able to regulate stem cell proliferation by secreting the paracrine factor Unpaired onto the cells attached to them. Unpaired activates the JAK-STAT pathway in the adjacent germ stem cells to specify their self-renewal. Those cells that are distant from the paracrine factor cannot receive this signal, they begin their differentiation into the sperm cell lineage. This means hub cells act as

TLS Online TPP Program

#Question id: 8846

#Unit 9. Diversity of Life Forms

Why are hydrocarbons insoluble in water?

TLS Online TPP Program

#Question id: 32291

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the structure shown

 

TLS Online TPP Program

#Question id: 33334

#Unit 2. Cellular Organization

During one generation, all cellular constituents increase proportionally; cells are thus said to be in: 

a. Log phase

b. Lag phase

c. Balanced growth phase

d. Stationary Phase

TLS Online TPP Program

#Question id: 5695

#Unit 8. Inheritance Biology

Triploids are usually autopolyploids. They arise spontaneously in nature, but they can be constructed by geneticists from the cross of a 4n (tetraploid) and a 2n (diploid). Triploids are characteristically sterile due to