Life Processes: Blood flow, Photosynthesis, and Other Life-Related Processes

In this quiz, you are going to solve questions related to various life processes like blood flow, photosynthesis, food digestion, nerves, and arteries.

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The blood leaving the tissues becomes richer in

Carbon dioxide Water Heamoglobin Oxygen

The filtration units of kidneys are called

Ureter Urethra Neurons Nephrons

Which of the following statements about the autotrophs is incorrect?

They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll. They store carbohydrates in the form of starch. They convert carbon dioxide and water into carbohydrates in the absence of sunlight. They constitute the first trophic level in food chains.

Arjun appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

The aquatic plants use the carbon dioxide gas dissolved in water for carry out photosynthesis. The water required by the plants for photosynthesis is absorbed by the roots of the plants from the soil through the process of osmosis. The plants also need materials like nitrogen, phosphorus, iron and magnesium. The site of photosynthesis in a cell of a leaf are chromoplast.

The internal (cellular) energy reserve in autotrophs is

Glycogen Protein Starch Fatty acid

The back flow of blood during the pumping of blood by heart is prevented by:

Walls of ventncles Walls of atrium Valves in heart Walls between atria and ventricles

The part where the exchange of gases occurs during respiration is:

Lungs and larynx Alveoli and throat Throat and lungs Alveoli and capillaries

The extracellular fluid released from the capillaries is:

Serum

Plasma

Lymph

Mucus

The process of digestion is completed by:

Intestinal juice

Trypsin

Bile juice

Pepsin

Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?

Ethanol + Carbon dioxide + Energy Lactic acid + Energy Carbon dioxide + Water + Energy Pyruvate

The mode of nutrition found in fungi is:

Parasitic nutrition Holozoic nutrition Autotrophic nutrition Saprotrophic nutrition

When air is blown from mouth into a test – tube containing lime water, the lime water turned milky due to presence of:

Oxygen

Nitrogen

Water vapour

Carbon dioxide

The site of photosynthesis in the cells of a leaf is

Chloroplast

Mitochondria

Cytoplasm

Protoplasm

During contraction of heart, what prevents back flow of blood?

Thin walls of atria Thick muscular walls of ventricles Valves in heart All of the above

Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?

Starch breaking down into sugars.

Proteins breaking down into amino acids.

Absorption of vitamins.

Fats breaking down into fatty acids and glycerol.

Which region of the alimentary canal absorbs the digested food?

Stomach

Small intestine

Large intestine

Liver

The contraction and expansion movement of the walls of the food pipe is called:

translocation

transpiration

peristaltic movement

digestion

When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains:

fats

complex proteins

starch

simple proteins

The exit of unabsorbed food material is regu-lated by

liver

anus

small intestine

anal sphincter

The enzyme responsible for the digestion of proteins in the small intestine is:

Pepsin

Trypsin

Amylase

Lipase

Quiz/Test Summary

Title: Life Processes: Blood flow, Photosynthesis, and Other Life-Related Processes

Questions: 20

Contributed by:

james Wed, Mar 23, 2022 07:35 AM UTC

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