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TLS Online TPP Program

#Question id: 12527

Which of the following is the incorrect prediction about ABA translocation in vascular tissue by both the xylem and the phloem?

#Unit 6. System Physiology – Plant
  1. ABA synthesized in the roots can also be transported to the shoot via the xylem
  2. the concentration of ABA in the xylem sap of well-watered sunflower plants is between 1.0 and 15.0 nM, while in in waterstressed plants increases to as much as 3000 nM (3.0 µM )
  3. Concentration of 15.0 nM ABA in the apoplast is sufficient to close stomata, all of the ABA in the xylem stream reaches the guard cells
  4. ABA also is transported in a conjugated form, then released by hydrolysis in leaves.
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TLS Online TPP Program

#Question id: 1397

#Unit 4. Cell Communication and Cell Signaling

The vertebrate equivalent of CED-9 is:
TLS Online TPP Program

#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
TLS Online TPP Program

#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
TLS Online TPP Program

#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
TLS Online TPP Program

#Question id: 1401

#Unit 4. Cell Communication and Cell Signaling

Which of the following are proto-oncogenes?

a. fos               b. myc             c. p53              d. ras               e. Rb
TLS Online TPP Program

#Question id: 1402

#Unit 4. Cell Communication and Cell Signaling

Which of the following oncoproteins possess(es) protein kinase activity?