Practice Questions

TLS Online TPP Program

#Question id: 19097

Erwinia is a pathogen that deploy__
a) Attacking Initial biotrophic phase and extensive plant tissue damage at later stages or even death
b) Intimate intracellular contact with plant cells and minimal plant cell damage
c) Releases pectic enzyme that dissolve the cell wall

#Unit 6. System Physiology – Plant

A and C
B and C
A and B
Only C

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TLS Online TPP Program

#Question id: 7766

#Unit 5. Developmental Biology

The relationship between shortened telomeres and stem cell depletion has been seen in degenerative diseases such as mouse muscular dystrophy,

I) When____ is activated by damaged telomeres, DNA replication halts, and if the repair doesn’t work, apoptosis is initiated. If the cell is a stem cell or some other rapidly replicating cell, this will reduce the numbers of cells produced, and the lack of stem cells will produce an “aged” phenotype.

II) When ____ is activated by damaged telomeres, DNA replication halts, repair do its work, apoptosis is inhibited. If the cell is a stem cell or some other rapidly replicating cell, this will increase the numbers of cells produced, and then these cells will produce an “aged” phenotype.

Choose correct gene name with right statement

TLS Online TPP Program

#Question id: 15488

#Unit 12. Applied Biology

IMP biosynthetic genes constitute the pur operon and are involved in Purines synthesis. Bacterial strain used for this

TLS Online TPP Program

#Question id: 13155

#Unit 2. Cellular Organization

Lysozyme is an enzyme that destroys bacterial cell walls. It does so by hydrolyzing the β(1→4) glycosidic linkages from N- acetylmuramic acid (NAM or MurNAc) to N- acetylglucosamine (NAG or GlcNAc) in cell wall peptidoglycans. The only functional groups in the immediate vicinity of lysozyme’s reactive center that have the required catalytic properties are the side chains of Glu 35 and Asp 52.

a- Glu perform reaction in its protonated state and Asp perform reaction in its deprotonated state.

b- Glu perform reaction in its deprotonated state and Asp perform reaction in its protonated state.

c- both in its protonated form