Under what conditions does the trp repressor block transcription of the trp operon?

#Question id: 14140

#SCPH01 Biochemistry

#Question id: 7290

#SCPH01 Biochemistry

Following figure regarding to regulatory network in the Arabidopsis shoot meristem stem-cell niche.

A. The transcription factor WUS is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the CLV3.

B. The transcription factor CLV3 is synthesized in the cell A and moves via plasmodesmata into cell B, where one of its functions is to induce expression of the WUS.

C. Secreted CLV3 protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses WUS transcription.

D. Secreted WUS protein from cell B binds to the receptor protein kinase on the surface of cell A; there, it activates a signal that represses CLV3 transcription.

Which of the following combination is correct?

#Question id: 1563

#SCPH05 I Biotechnology

A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to ________.

#Question id: 10527

#SCPH06 I Botany

Based on their feeding behaviors, three major types of insect herbivores can be distinguished, which evades the constitutive defense;

A) Phloem feeders                                                                    i) caterpillars, grasshoppers, and beetles

B) Cell-content feeders                                                            ii) aphids and whiteflies

C) Chewing insects                                                                    iii) mites and thrips

Correctly match the feeding behaviour with its insects;

#Question id: 5248

#SCPH28 | Zoology

Which of the following is a description of generalized transduction?