Practice Questions

TLS Online TPP Program

#Question id: 10349

Elevated plastid levels of glutamine stimulate the activity of glutamate synthase (also known as glutamine:2- oxoglutarate aminotransferase, or GOGAT). Given below some of the statements about GOGAT, which one of the following is incorrect?

#Environmental Science

Plants contain two types of GOGAT; one accepts electrons from NADH, and the other accepts electrons from ferredoxin (Fd)
The NADH type of the enzyme (NADH-GOGAT) is located in plastids of nonphotosynthetic tissues such as roots or the vascular bundles of developing leaves
The ferredoxin-dependent type of glutamate synthase (Fd-GOGAT) is found in chloroplasts and serves in photorespiratory nitrogen metabolism
This enzyme transfers the amide group of glutamate to 2-oxoglutarate, yielding two molecules of glutamine

More Questions

#Question id: 40477

#Applied Microbiology

Read the following statements regarding immune cells and select the correct option.

Statement I: All nucleated cells in the body can act as professional antigen-presenting cells

Statement II: B cells internalize antigens via receptor-mediated endocytosis and present them to Helper T cells.

#Question id: 40478

#Applied Microbiology

Consider the following statements about Macrophages:

They are phagocytic cells.
They express MHC Class II molecules on their surface.
They are classified as granulocytes like Basophils.
Which of the statements given above are correct?

#Question id: 40479

#Applied Microbiology

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Dendritic cells are critical for initiating a primary immune response.

Reason (R): They are the only antigen-presenting cells capable of stimulating naive T cells.

#Question id: 40480

#Applied Microbiology

Match the Immune Cell (List I) with its primary characteristic/function (List II).

List I (Cell Type)	List II (Characteristic)
A. B cell	1. Granulocyte involved in allergic responses; releases histamine.
B. Dendritic cell	2. Produces antibodies; acts as an APC.
C. Basophil	3. Phagocyte; acts as a scavenger and APC.
D. Macrophage	4. Most effective APC; bridge between innate and adaptive immunity.

#Question id: 40481

#Applied Microbiology

Which specific chemical element, released from CFCs in the stratosphere, acts as a catalyst to break down Ozone ( $O_3$ ) into Oxygen ( $O_2$ )

#Question id: 40482

#Applied Microbiology

Which international treaty was signed specifically to control the emission of Ozone Depleting Substances (ODS) like CFCs?