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TLS Online TPP Program

#Question id: 11970

Why do the cells of the digestive system secrete proteolytic enzymes, such as pepsin, in their inactive forms?

#Unit 7. System Physiology – Animal
  1. These proteolytic enzymes, in active form, would digest the very tissues that synthesize them.
  2. By secreting inactive enzymes, the catalytic activity of the enzymes is maintained for a longer time.
  3. The stomach is too acidic to maintain these enzymes in their active form.
  4. Inactive pepsin and trypsin are more easily transported across the cell membrane
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TLS Online TPP Program

#Question id: 12634

#Unit 6. System Physiology – Plant

During Brassinosteroid (BR) signal transduction pathway two forms exist,
1) In absence of Brassinolide
2) In presence of Brassinolide
a) BKI1 is phosphorylated and dissociates from the plasma membrane
b) BRI1 phosphorylation, and promotes BRI1–BAK1 heterodimerization, bringing their cytoplasmic domains together for interaction, transphosphorylation
c) BRI1 and BAK1 can form homodimers and both undergoes endocytosis and recycling
d) BIN2 kinases Phosphorylate transcriptional factor BES1 and BZR1 and these Phosphorylated proteins are shortlived and are degraded in the proteasome
e) BSK proteins activate BSU1 phosphatase which dephosphorylated BIN2 is degraded by the proteasome system
f) In absence of BIN2, dephosphorylated  transcriptional factor BES1 and BZR1 form heterodimers with different transcription factors and bind E-box sequences to activate genes.
Find out the correct match with in absence and presence of BL in BRs signal transduction pathway
TLS Online TPP Program

#Question id: 6951

#Unit 5. Developmental Biology

In chick development, the cell movement during gastrulation is called:
TLS Online TPP Program

#Question id: 5451

#Unit 8. Inheritance Biology

High heritability is best demonstrated in which of the following situations?
TLS Online TPP Program

#Question id: 2253

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following lipid linked proteins (column I) with their function (Column II).

Column I

Column II

A. prenylated proteins

i. These proteins are located in a number of subcellular compartments, including the cytosol, the endoplasmic reticulum, the inner face of the plasma membrane, and the nucleus.

B. fatty acylated proteins

ii. The core structure of these proteins consists of phosphatidylinositol glycosidically linked to a linear tetrasaccharide composed of three mannose residues and one glucosaminyl residue.

C. glycosylphosphatidylinositol-linked proteins

iii. The proteins that have covalently attached lipids that are built from isoprene units

TLS Online TPP Program

#Question id: 33471

#Unit 2. Cellular Organization