#Question id: 10774
#Unit 6. System Physiology – Plant
Following are a few statements regarding the structure of terpenes:
a) Isopentenyl diphosphate and Dimethyallyl diphosphate are combinely called monoterpene, respectively
b) Isopentenyl diphosphate and Farnesyl diphosphate are Sesquiterpenes and Tetraterpenes
c) Monoterpenes, Sesquiterpenes and Diterpenes have 10, 20 and 30 carbons, respectively
d) Grenyl grenyl diphosphate usually have 20 carbons compound by multiplying with 2X is known as testraterpenes
Which combination of the above statements is correct?
#Question id: 19987
#Unit 2. Cellular Organization
#Question id: 26978
#Unit 10. Ecological Principles
If the organism have survival of juveniles and adult is poor, selection pressure favors in these organisms
#Question id: 674
#Unit 1. Molecules and their Interaction Relevant to Biology
Proline is not often found in a-helices of proteins because it
#Question id: 10920
#Unit 6. System Physiology – Plant
The pressure-flow model, first proposed by Ernst Münch, Phloem loading at the source and phloem unloading at the sink establish the pressure gradient.
a.) In source tissues, an accumulation of sugars in the sieve elements generates a lower or negative solute potential (ψs).
b.) source tissue, causes a steep drop in the water potential (ψ), due to water potential gradient, water enters the sieve elements and causes turgor pressure (ψp ) decrease.
c.) In sink tissues, phloem unloading leads to a lower sugar concentration in the sieve elements, generating a higher or less negative solute potential.
d.) As the water potential of the phloem rises above that of the xylem, water tends to leave the phloem in response to the water potential gradient, causing a decrease in turgor pressure in the sieve elements of the sink.
Which of the following statements of sink and source tissue is FALSE?