Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

#Question id: 10535

#SCPH05 I Biotechnology

The insect ingests plant tissue containing the fatty acids, an enzyme in the gut conjugates the plant-derived fatty acid to an insect-derived amino acid to form an elicitor, When plants recognize elicitors from insect saliva induces some typical responses such as

a) Increasing Ca²⁺ levels in the cytosol and then activate an array of target proteins, such as calmodulin and other Ca²⁺-dependent protein kinases

b) In Arabidopsis, a calmodulin-binding transcriptional regulator called IQD1 was identified as an important mediator of defense responses against insect herbivory

c) overexpression of IQD1 in Arabidopsis activate the herbivore activity

d) IQD1 binds calmodulin, a major Ca2+-binding protein, in a Ca2+-dependent manner and subsequently inhibits the gene involved in glucosinolate biosynthesis

Which of the following combination from above statements is correct?

#Question id: 3663

#SCPH01 Biochemistry

_______________ is a specific RNase which cuts RNA–DNA hybrids; involved in replication of ColE1-like plasmids.

#Question id: 1697

#I Life Science/ Life Sciences Group – I-V

Cross-presentation of exogenous antigen to αβ T-cells does NOT require the involvement of:

#Question id: 3473

#SCPH28 | Zoology

Effective and biparental caring of offspring is more common in

#Question id: 2281

#SCPH05 I Biotechnology

Enzymes embedded in the membrane of the smooth ER