Molecular oxygen formed during plant photosynthesis is derived exclusively from: a) CO2 b) Water c) carbohydrates d) none of the above

Molecular oxygen formed during plant photosynthesis is derived exclusively from: a) CO2 b) Water c) carbohydrates d) none of the above
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ANSWER: B -- WATER
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The liberation of oxygen during photosynthesis is due to - (1) hydrolysis of carbohydrates (2) photolysis of water (3) reduction of CO2 (4) breakdown of chlorophyll

Description : The liberation of oxygen during photosynthesis is due to - (1) hydrolysis of carbohydrates (2) photolysis of water (3) reduction of CO2 (4) breakdown of chlorophyll

Last Answer : (2) photolysis of water Explanation: In the process of photosynthesis, oxygen is produced from the photolysis of water. The photolysis of water occurs when light is used to renew split water and ... , also referred to as ATP. The hydrogen remains in the leaf and participates in further reactions.

The liberation of oxygen during photosynthesis is due to (1) hydrolysis of carbohydrates (2) photolysis of water (3) reduction of CO2 (4) breakdown of chlorophyll

Description : The liberation of oxygen during photosynthesis is due to (1) hydrolysis of carbohydrates (2) photolysis of water (3) reduction of CO2 (4) breakdown of chlorophyll

Last Answer : photolysis of water

Which of the following is correct about the photorespiration? a. Photorespiration is more efficient in synthesizing glucose than photosynthesis. b. C3 plants are best adapted to handle c. Photorespiration is likely to occur when oxygen level is high and CO2 level is d. During photorespiration plants use oxygen to break down carbohydrates and release e. All of these

Description : Which of the following is correct about the photorespiration? a. Photorespiration is more efficient in synthesizing glucose than photosynthesis. b. C3 plants are best adapted to handle c. ... During photorespiration plants use oxygen to break down carbohydrates and release e. All of these

Last Answer : c. Photorespiration is likely to occur when oxygen level is high and CO2 level is

Water vapour comes out from the plant leaf through the stomatal opening. Through the samestomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options. (a) The above processes happen only during night time. (b) One process occurs during day time and the other at night. (c) Both processes cannot happen simultaneously. (d) Both processes can happen together because the diffusion coefficient of water and CO2 is different

Description : Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above ... Both processes can happen together because the diffusion coefficient of water and CO2 is different

Last Answer : (d) Both processes can happen together because the diffusion coefficient of water and CO2 is different

Carbohydrates are commonly found as starch in plants storage organs. Which of the following five properties of starch (1-5) make it useful as a storage material? (1) Easily translocated (2) Chemically non-reactive (3) Easily digested by animals (4) Osmotically inactive (5) Synthesized during photosynthesis The useful properties are (a) (1), (3) and (5) (b) (1) and (5) (c) (2) and (3) (d) (2) and (4).

Description : Carbohydrates are commonly found as starch in plants storage organs. Which of the following five properties of starch (1-5) make it useful as a storage material? (1) Easily translocated (2) Chemically non-reactive (3) Easily digested by ... 5) (b) (1) and (5) (c) (2) and (3) (d) (2) and (4).

Last Answer : (d) (2) and (4).

Compared to the resting state, vigorously contracting muscle shows (A) An increased conversion of pyruvate to lactate (B) Decreased oxidation of pyruvate of CO2 and water (C) A decreased NADH/NAD+ ratio (D) Decreased concentration of AMP CARBOHYDRATES AND CARBOHYDRATE METABOLISM 21

Description : Compared to the resting state, vigorously contracting muscle shows (A) An increased conversion of pyruvate to lactate (B) Decreased oxidation of pyruvate of CO2 and water (C) A decreased NADH/NAD+ ratio (D) Decreased concentration of AMP CARBOHYDRATES AND CARBOHYDRATE METABOLISM 21

Last Answer : A

Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c) four carbon acids are the primary initial CO2 fixation products (d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Description : Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c ... d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Last Answer : (d) the primary fixation of CO2 is mediated via PEP carboxylase.

Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in (A) Coagulation and flocculation of colloids (B) Oxidation of carbonaceous matter to CO2 (C) Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate (D) All (A), (B) and (C)

Description : Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in (A) Coagulation and flocculation of colloids (B) Oxidation of carbonaceous matter to CO2 (C) ... to the nitrite and eventually to the nitrate (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Plants produce carbohydrates from the CO2 present in the atmosphere by (A) Polymerisation (B) Photochemical reaction (C) Oxidation (D) None of these

Description : Plants produce carbohydrates from the CO2 present in the atmosphere by (A) Polymerisation (B) Photochemical reaction (C) Oxidation (D) None of these

Last Answer : (B) Photochemical reaction

Plants produce carbohydrates from the CO2 present in the atmosphere by (A) Polymerisation (B) Photochemical reaction (C) Oxidation (D) None of these

Description : Plants produce carbohydrates from the CO2 present in the atmosphere by (A) Polymerisation (B) Photochemical reaction (C) Oxidation (D) None of these

Last Answer : (B) Photochemical reaction

In the first stage of photosynthesis, light energy is used to: a) move water molecules b) denature chlorophyll c) split water d) produce carbohydrates

Description : In the first stage of photosynthesis, light energy is used to: a) move water molecules b) denature chlorophyll c) split water d) produce carbohydrates

Last Answer : ANSWER: C -- SPLIT WATER

During photosynthesis a plant uses energy from the sun to break apart glucose water and carbon dioxide. These molecules are used to make sugar to feed the plant and the plant then releases a by-product oxygen that humans breathe. this example shows that?

Description : During photosynthesis a plant uses energy from the sun to break apart glucose water and carbon dioxide. These molecules are used to make sugar to feed the plant and the plant then releases a by-product oxygen that humans breathe. this example shows that?

Last Answer : energy is not created but transferred to different forms (apex gang ;)

Ano ang tagalog ng The Kingdom Plantae Virtually all other living creatures depend on plants to survive. Through photosynthesis plants convert energy from sunlight into food stored as carbohydrates. B?

Description : Ano ang tagalog ng The Kingdom Plantae Virtually all other living creatures depend on plants to survive. Through photosynthesis plants convert energy from sunlight into food stored as carbohydrates. B?

Last Answer : What is the answer ?

The primary energy source produced by photosynthesis is A A. Glucose B. Fats C. Carbohydrates D. Proteins

Description : The primary energy source produced by photosynthesis is  A A. Glucose  B. Fats C. Carbohydrates D. Proteins

Last Answer : Glucose 

The primary energy source produced by photosynthesis is A A. Glucose B. Fats C. Carbohydrates D. Proteins

Description : The primary energy source produced by photosynthesis is A A. Glucose B. Fats C. Carbohydrates D. Proteins

Last Answer : Glucose

Enzymes are(A) Proteins with high molecular weight (around 10,000)(B) Derived from living organisms(C) Catalyst for temperature sensitive reactions(D) All (A), (B) and (C)

Description : Enzymes are (A) Proteins with high molecular weight (around 10,000) (B) Derived from living organisms (C) Catalyst for temperature sensitive reactions (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring ? Justify your answer. -Science

Description : If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring ? Justify your answer. -Science

Last Answer : When photosynthesis occurs during the day, the carbon dioxide released by plants by respiration is all used up and not released. Similarly, some of the oxygen produced during photosynthesis is used up in ... and taking in oxygen even during the day, it means that no photosynthesis is taking place.

Select the correct statement: (1) C4 pathway for. CO2 fixation were discovered by Hatch and Slack (2) CO2 is essential for photosynthesis (3) Addition of sodium carbonate in water retards photosynthetic rate in vallisneria (4) Phloem is the principal pathway for translocation of solutes

Description : Select the correct statement: (1) C4 pathway for. CO2 fixation were discovered by Hatch and Slack (2) CO2 is essential for photosynthesis (3) Addition of sodium carbonate in water retards photosynthetic rate in vallisneria (4) Phloem is the principal pathway for translocation of solutes

Last Answer : Ans. ((c))

O2 released in the process of photosynthesis comes from (a) CO2 (b) Water (c) Sugar (d) Pyruvic acid

Description : O2 released in the process of photosynthesis comes from (a) CO2 (b) Water (c) Sugar (d) Pyruvic acid

Last Answer : Ans:(b)

Antioxidants help a person maintain good health because they (a) prevent the vitamins deficiency. (b) prevent excessive oxidation of glucose and other carbohydrates. (c) neutralise the free radicals formed in the body during metabolism. (d) activate certain genes in the body cells which help delay the ageing process.

Description : Antioxidants help a person maintain good health because they (a) prevent the vitamins deficiency. (b) prevent excessive oxidation of glucose and other carbohydrates. (c) neutralise the free radicals ... metabolism. (d) activate certain genes in the body cells which help delay the ageing process.

Last Answer : Ans:(c)

The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be (A) 27.6 (B) 23 (C) 47.3 (D) 42.9

Description : The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be (A) 27.6 (B) 23 (C) 47.3 (D) 42.9

Last Answer : (B) 23

Does photosynthesis activity vary based on the amount of available CO2?

Description : Does photosynthesis activity vary based on the amount of available CO2?

Last Answer : It would be an asymptotic curve leveling off as the atmosphere approaches the levels plants have evolved to expect here on Earth. A pure CO2 atmosphere, even if it were possible to eliminate the ... that would generate, would be no better for plants than the atmosphere the have thrived in.

In photosynthesis is chlorophyll considered a reactant a product neither how does the role of chlorophyll compare with the roles of co2 and h20?

Description : In photosynthesis is chlorophyll considered a reactant a product neither how does the role of chlorophyll compare with the roles of co2 and h20?

Last Answer : Need answer

The balance of CO2 and O2 in atmosphere is due to _____. (1) Transportation (2) Photosynthesis (3) Respiration (4) Evaporation

Description : The balance of CO2 and O2 in atmosphere is due to _____. (1) Transportation (2) Photosynthesis (3) Respiration (4) Evaporation

Last Answer : (2) Photosynthesis Explanation: Photosynthesis takes in the carbon dioxide produced by all breathing organisms and reintroduces oxygen into the atmosphere.

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct? (a) Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate.(b) C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum. (c) Tomato is a greenhouse crop which can be grown in CO2-enriched atmosphere for higher yield. (d) Light saturation for CO2 fixation occurs at 10% of full sunlight.

Description : With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct? (a) Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate. ( ... for higher yield. (d) Light saturation for CO2 fixation occurs at 10% of full sunlight.

Last Answer : (b) C3 plants respond to higher temperature with enhanced photosynthesis while C4 plants have much lower temperature optimum

PGA as the first CO2 fixation product was discovered in photosynthesis of (a) bryophyte (b) gymnosperm (c) angiosperm (d) alga.

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Last Answer : (d) alga.

The oxygen evolved during photosynthesis comes from water molecules . Which one of the following pairs of elemnets is involved in this reaction ?

Description : The oxygen evolved during photosynthesis comes from water molecules . Which one of the following pairs of elemnets is involved in this reaction ?

Last Answer : The oxygen evolved during photosynthesis comes from water molecules . Which one of the ... Manganese and Potassium D. Magnesium and Molybdenum

Oxygen during photosynthesis comes from water was proved by `O^(18)` experiment

Description : Oxygen during photosynthesis comes from water was proved by `O^(18)` experiment

Last Answer : Oxygen during photosynthesis comes from water was proved by `O^(18)` experiment A. Ruben and Kamen B. Hill C. Warburg D. Blackman

Algae often float on surface of water during the day but sink down during the night due to (a) Evolution and trapping of oxygen bubbles during the day in their photosynthesis (b) Becoming light as they consume most of their food in the night (c) Warming action of sun during the day (d) Release of absorbed air by warming of water

Description : Algae often float on surface of water during the day but sink down during the night due to (a) Evolution and trapping of oxygen bubbles during the day in their photosynthesis (b) Becoming light as they ... (c) Warming action of sun during the day (d) Release of absorbed air by warming of water

Last Answer : Ans:(a)

Oxygen liberated during photosynthesis is coming from : (1) Carbon dioxide (2) Water (3) Bresk down of chlorophy II (4) Atmosphere

Description : Oxygen liberated during photosynthesis is coming from : (1) Carbon dioxide (2) Water (3) Bresk down of chlorophy II (4) Atmosphere

Last Answer : (2) Water Explanation: Oxygen liberated during photosynthesis is coming m6t.o create a stable, unstirred layer to support surface neutralization of acid and act as a protective physical barrier against luminal pepsin.

The source of oxygen generated during photosynthesis is: (1) water (2) carbon dioxide (3) chlorophyll (4) mesophyll cells

Description : The source of oxygen generated during photosynthesis is: (1) water (2) carbon dioxide (3) chlorophyll (4) mesophyll cells

Last Answer : (1) water Explanation: The source of oxygen produced during photosynthesis is the splitting of water molecule into hydrogen and oxygen. Photosynthesis uses carbon dioxide and water, releasing ... inside organelles called chloroplasts, while in bacteria they are embedded in the plasma membrane.

The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction?(a) Magnesium and Molybdenum (b) Magnesium and Chlorine (c) Manganese and Chlorine (d) Manganese and Potassium

Description : The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction? (a) Magnesium and Molybdenum (b) Magnesium and Chlorine (c) Manganese and Chlorine (d) Manganese and Potassium

Last Answer : (c) Manganese and Chlorine

The oxygen liberated during photosynthesis comes from (1) Water (2) Carbon dioxide (3) Glucose (4) Chlorophyll

Description : The oxygen liberated during photosynthesis comes from (1) Water (2) Carbon dioxide (3) Glucose (4) Chlorophyll

Last Answer : Water

The source of oxygen generated during photosynthesis is : (1) water (2) carbon dioxide (3) chlorophyll (4) mesophyll cells

Description : The source of oxygen generated during photosynthesis is : (1) water (2) carbon dioxide (3) chlorophyll (4) mesophyll cells

Last Answer : water

Oxygen liberated during photosynthesis is coming from : (1) Carbon dioxide (2) Water (3) Bresk down of chlorophy II (4) Atmosphere

Description : Oxygen liberated during photosynthesis is coming from : (1) Carbon dioxide (2) Water (3) Bresk down of chlorophy II (4) Atmosphere

Last Answer : Water

Carbohydrates are composed of ____ and ____. a. carbon, water c. zinc, aluminum b. hydrogen, oxygen d. gold, calcium

Description : Carbohydrates are composed of ____ and ____. a. carbon, water c. zinc, aluminum b. hydrogen, oxygen d. gold, calcium

Last Answer : a. carbon, water

If a forest is producing enough oxygen for both the plant and animals in the forest to use is there more photosynthesis happening within plants?

Description : If a forest is producing enough oxygen for both the plant and animals in the forest to use is there more photosynthesis happening within plants?

Last Answer : What is the answer ?

In glycolysis, during oxidation electrons are removed by (a) ATP (b) glyceraldehyde-3-phosphate (c) NAD+ (d) molecular oxygen.

Description : In glycolysis, during oxidation electrons are removed by (a) ATP (b) glyceraldehyde-3-phosphate (c) NAD+ (d) molecular oxygen.

Last Answer : (c) NAD+

First product formed when CO2 is fixed during dark reaction in C3 cycle. -Biology

Description : First product formed when CO2 is fixed during dark reaction in C3 cycle. -Biology

Last Answer : answer:

Oxygen liberated during photosynthesis comes from

Description : Oxygen liberated during photosynthesis comes from

Last Answer : Oxygen liberated during photosynthesis comes from A. Water B. `Co_(2)` C. Soil D. Atmosphere

Which one of the following categories of organisms do not evolve oxygen during Photosynthesis

Description : Which one of the following categories of organisms do not evolve oxygen during Photosynthesis

Last Answer : Which one of the following categories of organisms do not evolve oxygen during Photosynthesis A. Red ... plants with Kranz anatomy D. Blue green algae

The source of oxygen evolved during photosynthesis is

Description : The source of oxygen evolved during photosynthesis is

Last Answer : The source of oxygen evolved during photosynthesis is A. `H_(2)S` B. `H_(2)O` C. `CO_(2)` D. `HCO_(3)`

Oxygen liberated during photosynthesis comes from

Description : Oxygen liberated during photosynthesis comes from

Last Answer : Oxygen liberated during photosynthesis comes from A. `CO_(2)` B. `H_(2)O` C. Phosphoglyceric D. Chlorophyll

Which one of the following categories of organisms do not evolve oxygen during Photosynthesis

Description : Which one of the following categories of organisms do not evolve oxygen during Photosynthesis

Last Answer : Which one of the following categories of organisms do not evolve oxygen during ... Photosynthetic green algae D. Photosynthetic bacteria

The gas released during photosynthesis : (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Sulphur dioxide

Description : The gas released during photosynthesis : (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Sulphur dioxide

Last Answer : (2) Oxygen Explanation: In plants, algae, and cyanobacteria, photosynthesis uses carbon dioxide and water, releasing oxygen as a waste product. Photosynthesis is vital for all aerobic life on Earth. In ... this process is: Carbon dioxide + Water + Light energy --> Carbohydrate + Oxygen + Water

During photosynthesis in plants, the gas evolved is - (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen

Description : During photosynthesis in plants, the gas evolved is - (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen

Last Answer : (3) Oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... , through primary production, or indirectly, as the ultimate source of the energy in their food.

During photosynthesis the liberated gas is (1) Carbon dioxide (2) oxygen (3) Nitrogen (4) Hydrogen

Description : During photosynthesis the liberated gas is (1) Carbon dioxide (2) oxygen (3) Nitrogen (4) Hydrogen

Last Answer : (2) oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... water, releasing oxygen as a waste product.' Photosynthesis is vital for all aerobic life on Earth.

Which of the following gases do plants and trees give out during photosynthesis? A. Hydrogen B. Nitrogen C. Oxygen (Answer) D. Carbon dioxide

Description : Which of the following gases do plants and trees give out during photosynthesis? A. Hydrogen B. Nitrogen C. Oxygen (Answer) D. Carbon dioxide

Last Answer : C. Oxygen (Answer)

How can you prove that oxygen is released during photosynthesis?

Description : How can you prove that oxygen is released during photosynthesis? 

Last Answer : Experiment: - i) Place a funnel over the shoot of hydra(water plant) in a beaker of water. ii) Invert a test tube filled with water over funnel. iii) Place funnel such that water can ... show that tube is rich with oxygen. viii) So it is proved that oxygen is released during photosynthesis. 

Oxygen is not produced during photosynthesis by (a) Green sulphur bacteria (b) Nostoc (c) Cycas (d) Chara.

Description : Oxygen is not produced during photosynthesis by (a) Green sulphur bacteria (b) Nostoc (c) Cycas (d) Chara.

Last Answer : (a) Green sulphur bacteria