Following statements are given regarding to the genes in Drosophila.

A. The anterior posterior compartment of each segment of drosophila is regulated by the expression of engrailed and wingless genes.

B. The gap genes are activated or repressed by the maternal effect genes, and are expressed in one or two broad domains along the anterior-posterior axis.

C. The transcription patterns of the anterior gap genes are initiated by the different concentrations of the Hunchback and Bicoid proteins.

D. The segment polarity genes encode proteins that are constituents of the delta-notch and Hedgehog signaling pathways.

E. After the segmental boundaries are set, the pair-rule and gap genes interact to regulate the homeotic selector genes, which specify the characteristic structures of each segment.

Which one of following option has all the correct statements?

TLS Online TPP Program

#Question id: 10188

#Unit 1. Molecules and their Interaction Relevant to Biology

Kinetic Isotope Effects (KIEs) are used to determine

A. reaction mechanisms

B. rate limiting steps

C. transition states

Which of the following is correct combination

TLS Online TPP Program

#Question id: 10189

#Unit 1. Molecules and their Interaction Relevant to Biology

A very common isotope substitution is when hydrogen is replaced by deuterium. This is known as a deuterium effect and is expressed by the ratio kH/kD (as explained above). Normal KIEs for the deuterium effect

TLS Online TPP Program

#Question id: 10190

#Unit 1. Molecules and their Interaction Relevant to Biology

Arrange the protium, deuterium and tritium water in increasing order of molarity. Suppose density 1g/ml.

TLS Online TPP Program

#Question id: 10191

#Unit 1. Molecules and their Interaction Relevant to Biology

Statements are given as

A. Primary kinetic isotope effects are rate changes due to isotopic substitution at a site of bond breaking in the rate determining step of a reaction.

B. Solvent shows primary kinetic isotope effect

C. Secondary kinetic isotope effects are rate changes due to isotopic substitutions at a site other than the bond breaking site in the rate determining step of the reaction.

D. Solvent shows primary kinetic isotope effect and secondary kinetic effect as well

Which of the following is correct combination of statements

TLS Online TPP Program

#Question id: 10192

#Unit 6. System Physiology – Plant

Solar-tracking leaves present a nearly vertical position at sunrise, and during the night the leaves take a horizontal position, the sensing of light in solar-tracking leaves occurs in specialized regions of the leaf or stem, it can response for,

TLS Online TPP Program

#Question id: 10193

#Unit 6. System Physiology – Plant

Leaf orientation is controlled by a specialized organ that contains motor cells that change their osmotic potential and generate mechanical forces that determine laminar orientation, that specialized organ is known as