Genome size (the length of DNA associated with one haploid complement of chromosomes) varies substantially between different organisms. Because more genes are required to direct the formation of more complex organisms, it is not surprising that genome size is roughly correlated with an organism’s apparent complexity. Which of the following statements is/are correct in reference to this rough correlation?

I. Many organisms of apparently similar complexities have very different genome sizes.

II. The number of genes, rather than genome size, is more closely related to organism complexity.

III. There is a roughly inverse correlation between organism complexity and gene density—the less complex the organism, the higher the gene density.

IV. Gene density in eukaryotic organisms is consistently higher and more variable than in their prokaryotic counterparts.

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#Question id: 29503

#Unit 6. System Physiology – Plant

Trichomes of nettles (Urtica dioica) have “cocktail” of secondary metabolites that can cause severe irritation of the skin of animals which are

a. Tartaric acid

b. Serotonin

c. Oxalic acid

d. Formic acid

Which of the following combination secondary metabolites is true

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#Question id: 29504

#Unit 6. System Physiology – Plant

Idioblasts cells are involved in the synthesis of

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#Question id: 29505

#Unit 6. System Physiology – Plant

Cicutoxin is produced by plant as constitutive chemical defenses which is

a. Produced by Hemlock (Cicuta sp.) 

b. Is  a polyacetylene

c. Involved in repolarization of neuronal action potentials

d. Involved in the suspension of all muscular activity

Which of the following is true regarding Cicutoxin

TLS Online TPP Program

#Question id: 29506

#Unit 6. System Physiology – Plant

The active principle in foxglove (Digitalis sp.) is cardinolide digitoxin  is a

a. cardiac glycoside 

b. that activate ATPase activity 

c. that inhibits ATPase activity 

d. can increase myocardial contraction

Which of the following is not true regarding digitoxin

TLS Online TPP Program

#Question id: 29507

#Unit 6. System Physiology – Plant

δ-Cadinene, Longifolene, Abietic Acid, Terpinolene, and -Pinene are the resin terpenoids that often contain cardiac glycosides produced by

TLS Online TPP Program

#Question id: 29508

#Unit 6. System Physiology – Plant

Conifer resin ducts produces different terpenes and resin acids which are released immediately upon damage by herbivores these are

Match them correctly with their example