Ultrastructural studies have led to the characterization of two distinctive cytological

pathways of PCD in plants;

I) Vacuolar-type PCD

II) Hypersensitive response-type (HR-type) PCD

a) cytosol and all its organelles, including the plasma membrane, are completely brokendown

b) The vacuole loses water, resulting in marked cell shrinkage, contraction from the cell wall,

and nuclear DNA degradation

c) PCD occurs in leaves in response to microbial attack

d) cell wall is either partially or completely digested as well, as in endosperm tissue

e) Continued water loss from the cytosol leads to the breakdown of the plasma membrane

and the release of residual cellular contents into the apoplast

Given characterization of PCD pathway match with its type PCD?

#Question id: 10346

#SCPH05 I Biotechnology

Nitrite reductase will convert nitrite to ammonium. There are two types of nitrite reductase characteristics given below;

a) Both nitrite reductase consist of a single 63kD polypeptide

b) In leaf chloroplasts and root plastids contain different forms of the nitrite reductase enzyme

c) In shoot nitrite reductase directly dependent on the light reaction by the ferredoxin, it activates nitrite reductase in choloroplast

d) NADPH in the roots is provided by pentose phosphate pathway, it also activate nitrite reductase in the plastids

Which of the correct statement about nitrite reductase characteristics?

#Question id: 3663

#SCPH01 Biochemistry

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

#Question id: 3870

#SCPH05 I Biotechnology

“Footprinting” or DNase protection is a technique used to identify:

#Question id: 10562

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

The direction and rate of water flow across a membrane are determined by

#Question id: 2936

#SCPH01 Biochemistry

The stable attachment of sister kinetochores to microtubules emanating from opposite spindle poles is called: