TLS Online TPP Program

#Question id: 803


A single-stranded DNA molecule contains 40 nucleotides and has the sequence 5’-(GA)20-3’. When this single strand binds to a complementary DNA strand to form a B-DNA structure,

#Part-B Specialized Branches in Biotechnology
  1. half the base-pairs will be A-G pairs and half will be C-T pairs.

  2. each base will form at least two hydrogen bonds with a base in the opposite strand.

  3. the two strands will form an antiparallel left-handed helix with 12 base pairs per turn.

  4. there will be covalent phosphodiester bonds between the two strands.

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TLS Online TPP Program

#Question id: 10506

#Part-B Specialized Branches in Biotechnology

Plant growth promoting rhizobacteria (PGPRs) such as Pseudomonas aeruginosa, that alleviate plant abiotic or biotic stress in soil by releasing of

TLS Online TPP Program

#Question id: 10507

#Part-B Specialized Branches in Biotechnology

Rhizobacteria function as

 a) Nitrogen fixation

 b) depositing pathogens directly into the vascular system,

 c) producing antibiotics and antifungal agents for inhibiting soil pathogens

 d) herbivore sensors by sending electrical or chemical signals to surrounding cells

 Which one of the following combination is correct?

TLS Online TPP Program

#Question id: 10508

#Part-B Specialized Branches in Biotechnology

Glandular trichomes store species-specific secondary metabolites in a pocket formed between the cell wall and the cuticle. These secondary metabolites are-

TLS Online TPP Program

#Question id: 10509

#Part-B Specialized Branches in Biotechnology

A different type of mechanical obstacle to herbivory is provided by mineral crystals that are present in many plant species, such as silica crystals known as

TLS Online TPP Program

#Question id: 10510

#Part-B Specialized Branches in Biotechnology

Constitutive chemical defenses are effective against many different herbivores, including insects and mammals. Hemlock (Cicuta sp.) produces which toxins that a polyacetylene prolongs the repolarization of neuronal action potentials.

TLS Online TPP Program

#Question id: 10511

#Part-B Specialized Branches in Biotechnology

Which type of pumps inhibits digitoxin in the membranes of heart cells, leading to increased myocardial contraction?