Practice Questions

TLS Online TPP Program

#Question id: 2210

Which of these is a general feature of the lipid bilayer in all biological membranes?

#Unit 2. Cellular Organization

Individual lipid molecules are free to diffuse laterally in the surface of the bilayer.
Individual lipid molecules in one face (monolayer) of the bilayer readily diffuse (flip-flop) to the other monolayer.
Polar, but uncharged, compounds readily diffuse across the bilayer.
The bilayer is stabilized by covalent bonds between neighboring phospholipid molecules.

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TLS Online TPP Program

#Question id: 7755

#Unit 5. Developmental Biology

which type of complex is required for movement of ATG9 from the phagophore assembly site to the peripheral site, where it obtains fresh membrane?

TLS Online TPP Program

#Question id: 7756

#Unit 5. Developmental Biology

Which of the following is serves to regulate the ATG9 membrane shuttle system?

TLS Online TPP Program

#Question id: 7757

#Unit 5. Developmental Biology

The TOR (target of rapamycin) kinase complex acts as a

TLS Online TPP Program

#Question id: 7758

#Unit 5. Developmental Biology

Chlorophyll is tightly bound in complexes with proteins. During senescence these chlorophyll–protein complexes must be dismantled to allow the apoproteins to be recycled by___

TLS Online TPP Program

#Question id: 7759

#Unit 5. Developmental Biology

WRKY plant-specific group of transcription factors that play important role in many plant metabolic and developmental processes such as;

a) It contain a 30 amino acid region named for the conserved amino acid sequence WRKYGQK in its N-terminal domain

b) It is an important regulators of plant–pathogen interactions as well as senescence

c) WRKY53 is involved in the regulation of dark-induced leaf senescence

d) In Arabidopsis, leaf senescence is delayed in knockout mutants of the WRKY53 gene

e) WRKY53 also binds to the promoter of the WRKY53 gene, inhibiting its own expression in a negative feedback loop

Which of the following given prediction about WRKY transcription factor is correct?

TLS Online TPP Program

#Question id: 7760

#Unit 5. Developmental Biology

In general, the hormones that regulate senescence can be divided into two basic categories based on their most commonly observed effects:

I) positive (promoting) senescence regulators and

II) negative (repressing) senescence regulators

a) Hormones involved-Ethylene, Abscisic acid (ABA)

b) Hormones involved-Brassinosteroids (BRs), Salicylic acid (SA), Jasmonic acid (JA)

c) Hormones involved-Cytokinin, Auxin, Gibberellin (GAs)

Select correct combinations from given hormones which are involved in regulators?