Practice Questions

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#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?

#SCPH06 I Botany

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

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#Question id: 3050

#SCPH06 I Botany

Agar is well suited as a solidifying agent because

A. it has been melted in boiling water

B. it can be cooled to about 40 to 42°C before hardening

C. it will not melt again until the temperature rises to about 80 to 90°C.

D. most microorganisms cannot degrade it.

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#Question id: 1708

#SCPH01 Biochemistry

When antigen reaches a lymph node in a primed animal:

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#Question id: 10978

#SCPH28 | Zoology

Which of the following events occurs at the end of the period of ventricular ejection?

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#Question id: 16311

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

What is stress?

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#Question id: 1270

#SCPH06 I Botany

Which of the following is a major extracellular molecule in mammals containing no protein portion?