1. Which of the following are energy foods?
(a) Carbohydrates and fats
(b) Proteins and mineral salts
(c) Vitamins and minerals
(d) Water and roughage
2. Roots of the plants absorb water from the soil through the process of:
(a) diffusion
(b) transpiration
(c) osmosis
(d) None of these
3. The site of photosynthesis in the cells of a leaf is
(a) chloroplast
(b) mitochondria
(c) cytoplasm
(d) protoplasm
4. In amoeba, food is digested in the:
(a) food vacuole
(b) mitochondria
(c) pseudopodia
(d) chloroplast
5. Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
(a) Starch breaking down into sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of vitamins.
(d) Fats breaking down into fatty acids and glycerol.
6. Which region of the alimentary canal absorbs the digested food?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Liver
7. The contraction and expansion movement of the walls of the food pipe is called:
(a) translocation
(b) transpiration
(c) peristaltic movement
(d) digestion
8. The exit of unabsorbed food material is regulated by
(a) liver
(b) anus
(c) small intestine
(d) anal sphincter
9. What are the products obtained by anaerobic respiration in plants?
(a) Lactic acid + Energy
(b) Carbon dioxide + Water + Energy
(c) Ethanol + Carbon dioxide + Energy
(d) Pyruvate
10. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
thank you
Answers
Answer:
1) carbohydrates and fats
2) osmosis
3)chloroplast
4)food vacoule
5)starch to amylase (sugar)
6)small intestine
7) peristaltic movement
8)anal sphincter
9)ethanol +CO2+energy
10) mitochondria
Explanation:
thanks..
Answer:
1. (A) carbohydrates and fats
2. (C) Osmosis
3. (A) Chloroplast
4. (A) Food vacuole
5. (A) Starch breaking down into sugar
6. (B) Small intestine
7. (C) Peristaltic movement
8. (D) Anal sphincter
9. (C) Ethanol + carbon-dioxide + energy
10. (B) Mitochondria
Explanation:
1. Carbohydrates and fats are the sources of energy. Carbohydrates and fats release energy when they are oxidized. Carbohydrates, unlike fats, are easily oxidized and turned into glucose, providing energy.
2. Osmosis allows root hair to absorb water from the soil. This absorption is done as the soil is hypotonic. Water can easily flow from a high-concentration area to a low-concentration area without expending any energy. The root cell membrane functions as a semipermeable membrane. The epidermis, cortex, endodermis, Casparian strip, and pericycle, as well as protoxylem and metaxylem, are all passed through
3. Photosynthesis is aided by chlorophyll, which is found in this chloroplast.
4. With the help of enzymes, food is digested in the food vacuole
5. Amylase is a starch hydrolase enzyme that catalyzes the conversion of starch to simple sugars. As a result, if salivary amylase is deficient, starch digestion is hampered.
6. Small intestine is the main organ for the absorption of food. The digestion is completed and glucose, fructose, fatty acids, glycol and amino acids are absorbed through the mucosa into the bloodstream and lymph.
7. The peristaltic movement, also known as Peristalsis, occurs when the food in the oesophagus and food pipe contracts and relaxes, forcing the food down the track to the stomach. An involuntary movement is required for food movement down the stomach and bowel movement down the anus.
8. The anal sphincter controls the release of unabsorbed food into the small intestine in tiny amounts. The anal sphincter controls the exit of unabsorbed food particles.
9. Ethanol, carbon dioxide, and energy are the end products of alcoholic fermentation in plants. Carbon dioxide is produced during alcoholic fermentation. These processes are catalyzed by the enzymes pyruvic acid decarboxylase and alcohol dehydrogenase.
10. In the cytoplasm, glucose is broken down into pyruvate, and energy is released in the form of ATP. Pyruvate enters mitochondria and then enters the Krebs cycle, where it is broken down into carbon dioxide and water, giving ATP and other by-products, which are subsequently sent down the electron transport chain to produce more ATPs.
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