Practice Questions

TLS Online TPP Program

#Question id: 381

Consider an acetate buffer, initially at the same pH as its pKa (4.76). When sodium hydroxide (NaOH) is mixed with this buffer, the:

#Unit 1. Molecules and their Interaction Relevant to Biology

pH rises more than if an equal amount of NaOH is added to an acetate buffer initially at pH 6.76
pH rises more than if an equal amount of NaOH is added to unbuffered water at pH 4.76.
ratio of acetic acid to sodium acetate in the buffer falls.
sodium acetate formed precipitates because it is less soluble than acetic acid.

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TLS Online TPP Program

#Question id: 31257

#Unit 5. Developmental Biology

Which of the following gene is expressed by all neoblasts and has become the most common marker for their identification across planarian species?

TLS Online TPP Program

#Question id: 31258

#Unit 5. Developmental Biology

In salamanders, regeneration blastema formed from:

TLS Online TPP Program

#Question id: 31259

#Unit 5. Developmental Biology

During salamander limb regeneration, which of the following functionally equivalent to apical ectodermal ridge during normal limb development?

TLS Online TPP Program

#Question id: 31260

#Unit 4. Cell Communication and Cell Signaling

A malignant neoplasm of epithelial origin such as endoderm (gut epithelium) or ectoderm (skin and neural epithelia) known as:

TLS Online TPP Program

#Question id: 31261

#Unit 4. Cell Communication and Cell Signaling

Most tumors induce the formation of new blood vessels that invade the tumor and nourish it, a process called as:

TLS Online TPP Program

#Question id: 31262

#Unit 4. Cell Communication and Cell Signaling

Which of the following is characteristic of a benign tumor?