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Plant Structure

Plant Structure
Which of the following elements is likely to form the least polar covalent bond with hydrogen?

Phosphorus
Oxygen
Carbon
Nitrogen

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Plant Structure
Which of the following is not an electron carrier class in the electron transport chain?

Iron - sulfur proteins
Cytochromes
Cytochrome c oxidase
Flavoproteins

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Plant Structure
"The universe tends towards maximum disorder" is stated by

third law of thermodynamics
first law of thermodynamics
None of these
second law of thermodynamics

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Plant Structure
A cell without cell wall is called

protoplast
symplast
none of these
apoplast

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Plant Structure
In plant cells, which of the following is not a function of the large central vacuoles of plant cells?

Storage of food
Contractile regulation of
Support
Waste storage water content

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Plant Structure
Water content of active protoplasm is

70%
90%
40%
10%

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