Practice Questions

TLS Online TPP Program

#Question id: 12721

There are the five groups of late embryogenesis abundant (LEA) proteins found in plants

Match the following groups of LEA protein with its functional information;

Group (family name)

                           Functional information

I) Group 1

   (D-19 family)

a) It is an abundant protein in cotton embryos, Each putative dimer of this group may bind as many as ten inorganic phosphates and their counterions

II) Group 2

    (D-11 family)

b) Possibly functions in ion sequestration to protect cytosolic metabolism When LE25 is expressed in yeast, it confers salt and freezing tolerance

III) Group 3

     (D-7 family)

c) In tomato, a gene encoding a similar protein is expressed in response to nematode feeding

IV) Group 4

    (D-95 family)

d) Contains more water of hydration than typical globular proteins Overexpression confers water deficit tolerance on yeast cells

V) Group 5

    (D-113 family)

e) Often localized to the cytoplasm or nucleus More acidic members of the family are associated with the plasma membrane May act to stabilize macromolecules at low water potential

#Unit 6. System Physiology – Plant

More Questions

#Question id: 1395

#Unit 4. Cell Communication and Cell Signaling

Which of the following mutations would promote malignancy in cells whose proliferation is inhibited by TGFβ?

a. overexpression of Smad2

b. loss of Smad 4

c. overexpression of TGFβ receptor I

d. loss of TGFβ receptor II

#Question id: 1396

#Unit 4. Cell Communication and Cell Signaling

Trks are:

a. endonucleases. b. transmembrane receptors. c. proteases. d. protein kinases.

#Question id: 1397

#Unit 4. Cell Communication and Cell Signaling

The vertebrate equivalent of CED-9 is:

#Question id: 1398

#Unit 4. Cell Communication and Cell Signaling

Which of the following properties is (are) characteristic of a benign tumor?

a. well differentiated b. localized to tissue of origin c. metastatic

d. promotes angiogenesis e. surrounded by a fibrous capsule

#Question id: 1399

#Unit 4. Cell Communication and Cell Signaling

Loss-of-function mutations in which of the following genes typifies colorectal carcinomas?

a. myc b. K-ras c. p53 d. APC

#Question id: 1400

#Unit 4. Cell Communication and Cell Signaling

Which property is shared by malignant tumor cells and transformed cells in culture?

a. reduced growth factor requirement b. attachment-dependent growth

c. loss of actin microfilaments d. altered morphology