Mechanical barriers provide a first line of defence against insect pests and pathogens, these mechanical barriers developed by plants;

COLUMN A	COLUMN B
A. Thorns	i) It can be found on the stem and petioles of roses and are formed by the epidermis
B. Spines	ii) Found on a lemon tree (Citrus sp.) are modified branches, as can be seen by their position in the axil of a leaf
C. Prickles	iii) Found on shoot and leaves of tomato (Solanum lycopersicum) are derived from epidermal cells
D. Trichomes	iv) which are characteristic of cacti (Opuntia spp.) in the New World, are modified leaves

Match correctly following combination of barrier developed by plants ;

TLS Online TPP Program

#Question id: 22023

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct equation for Haldane reversible reaction

TLS Online TPP Program

#Question id: 22024

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the statements regarding competitive inhibition are given below

a)  The effect of a competitive inhibitor depends on the inhibitor concentration, the substrate       concentration and the relative affinities of the substrate and the inhibitor for the enzyme.

b) if the substrate concentration is low, the degree of inhibition will be great.

c) the substrate concentration is high, then the degree of inhibition will be marked low

d) non-competitive inhibitor can combine with an enzyme molecule to produce a dead-end complex

Choose the incorrect statement

TLS Online TPP Program

#Question id: 22025

#Unit 1. Molecules and their Interaction Relevant to Biology

The Lineweaver-Burk equation in the presence of a competitive inhibitor will be: and Lineweaver-Burk plot showing the effect of competitive inhibition are shown

       

                      

What will be the value of X and X’ for above graph

TLS Online TPP Program

#Question id: 22060

#Unit 1. Molecules and their Interaction Relevant to Biology

Km can be calculated from two ways from Lineweaver-Burk equation, choose the most appropriate one

TLS Online TPP Program

#Question id: 22937

#Unit 5. Developmental Biology

Gene for regulatory pathway that promotes flowering of Arabidopsis in long days:

TLS Online TPP Program

#Question id: 22938

#Unit 5. Developmental Biology

Genes that regulate flowering, have different transcription factors and functions:

 

Choose correct match: