In which of the following condition premature mitotic CDK activation and premature entry into mitosis are seen? 

a) Gain-of-function of wee1 kinase

b) Loss-of-function of wee1 kinase

c) Gain-of-function of cdc25 phosphatase

d) Loss-of-function of cdc25 phosphatase

#Question id: 5018

#Unit 11. Evolution and Behavior

Which event is nearest in time to the end of the period known as snowball Earth?

#Question id: 32256

#Unit 2. Cellular Organization

#Question id: 1984

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a pathway that would lead to the activation of cytotoxic T cells?

#Question id: 762

#Unit 1. Molecules and their Interaction Relevant to Biology

Regarding the sugar residues in nucleic acids, which, if any, of the following statements is incorrect?

#Question id: 2532

#Unit 2. Cellular Organization

Nonenzymatic proteins whose exact functions are uncertain. Such proteins may be localized in the walls of specific cell types or more widespread;

cell wall protein                                                                                Tissue localization

A) HRGP (hydroxyprolinerich glycoprotein)                                  i) Xylem, fibers, cortex, root hairs

B) AGP (arabinogalactan protein)                                                  ii) Primary xylem and phloem

C) PRP (proline-rich protein)                                                           iii) Cambium, vascular parenchyma

 D) GRP (glycine-rich protein)                                                          iv) Varied cell-specific expression

Which of the following combination of nonenzymatic protein with its correct location?