Question

Which of the following statements about this reaction is true: 6 CO₂ + 6 H₂O + Heat à C₆H₁₂O₆ + 6 O₂

	a.	The Gibbs free-energy change of the reaction would be negative.
	b.	The products have lower potential energy than the reactants
	c.	This reaction is endothermic
	d.	The products have greater entropy than the reactants
	e.	This reaction is exothermic

An example of a sugar sink in plants is __________, which provide sugar for energy during ___________.

	a.	Flowers; active photosynthesis
	b.	All plant structures can serve as sugar sinks under all conditions
	c.	Roots; nighttime and accelerated growth
	d.	Leaves; nighttime and accelerated growth
	e.	Fruits; daytime in direct sun

Wind erosion and deforestation is harmful to soil health because it:

	a.	Destroys the humus, which has a high density of organic compounds
	b.	Increases the nitrogen content of the soil
	c.	Creates a balance of sand, silt, and clay
	d.	Increases humus formation
	e.	Allows for organisms such as nematodes, fungi, and bacteria to grow

The zone of cellular maturation contains:

	a.	The root cap and root hairs
	b.	Cells that are recently derived from primary meristematic tissues
	c.	Older, differentiated cells of the dermal, vascular, and ground tissue
	d.	The protoderm, ground meristem, and procambrium
	e.	The apical meristem

Nicotinamide dinucleotide (NAD) is a _____________ derived from ______________.

	a.	Cofactor; magnesium (Mg2+)
	b.	Coenzyme; vitamin B2
	c.	Cofactor; zinc (Zn2+)
	d.	Prosthetic group; non-amino molecules
	e.	Coenzyme; vitamin B3

Solvent X is a dry blue substance with unknown properties. In an attempt to characterize substance X, you go to the lab, then add water and substance X to a beaker to make a solution. After mixing for 20 minutes, you notice an accumulation of blue particles still on the bottom of the beaker. You measure the pH, and determine that pH = 3. What can you deduce about substance X?

	a.	It is nonpolar and basic
	b.	It is polar and acidic
	c.	It is polar and has a neutral pH
	d.	It is nonpolar and acidic
	e.	It is polar and basic

Which if the following plant types would most likely lead to the greatest genetic diversity from undergoing reproduction?

	a.	The chances of genetic diversity are equally likely in both types of plants
	b.	A plant that reproduces asexually
	c.	A plant that reproduces sexually

Which of the following statements are true regarding C₄ plants?

	a.	Initial fixation of CO2 is catalyzed by PEP carboxylase
	b.	Fewer ATP are used as compared to C3 plants
	c.	Stomata are only open at night
	d.	Photorespiration is increased
	e.	All of the above are correct

Which of the reactants becomes reduced in the reaction below?

C₆H₁₂O₆ + 10 NAD⁺ + 2 FAD + ADP + P_i à 6 CO₂ + 10 NADH + 2 FADH₂ + ATP

	a.	Glucose
	b.	Flavin adenine dinucleotide
	c.	Nicotinamide adenine dinucleotide
	d.	Adenosine diphosphate
	e.	Both B and C

Which of the following statements regarding the electron transport chain and oxidative phosphorylation is true?

	a.	It is the step of cellular respiration that generates the most ATP
	b.	It generates more ATP than fermentation
	c.	A mutation in complex II would still allow ATP to be produced via oxidative phosphorylation, but at a reduced capacity
	d.	ATP production is dependent upon the generation of a proton gradient
	e.	All of the above statements are true

1. You genetically modify a plant so that its chlorophyll a and chlorophyll b pigments no longer contain the ring structured head region. Which of following would be true?

   	a.	The photosynthetic ability of this plant would be impaired
   	b.	The photosynthetic ability of this plant would increase
   	c.	The photosynthetic ability of this plant would not be altered

Answer 1

1. C

Given that the equation of photosynthesis. It is the process by which atmospheric carbon dioxide and water absorbed from soil are utilised for the synthesis of sugar in the presence of Sunlight and chlorophyll molecules.

First option is incorrect because the Gibbs free energy is positive for this reaction and it is a type of non spontaneous reaction.

Second option is incorrect because products have less potential energy as compared to reactants.

Third option is correct and last option is incorrect because the reaction is endothermic as it consumes ATP.

Fourth option is incorrect because product have lower entropy then reactants.

2. C

Sugar are synthesized in leaves and their leaves are the source of Sugars. Rest all the other parts of plant are think because they obtain sugar from leaves.

First option is it correct because last do not show photosynthesis.

Second option is incorrect because leaves are not sink, they are source.

Third option is incorrect because roots are sink under night time condition.

According to guidelines, only first question and the answer. Please give a good rating.