Life Processes

The main function of villi in small intestine is to ____.

Correct! Wrong!

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Villi present in small intestine are finger like projections that help in absorption of digested food.

In bell jar experiment for photosynthesis, potassium hydroxide is used to ____.

Correct! Wrong!

In the bell jar experiment, potassium hydroxide is used to absorb carbon dioxide. This experiment proves that carbon dioxide is essential for photosynthesis.

The functions of stomata are ____.

Correct! Wrong!

Stomata are mainly involved in respiration and removal of water vapour from the leaves.

____ is proper description of human dentition.

Correct! Wrong!

Human dentition is thecodont, heterodont and diphyodont. Thecodont teeth are inside socket like structure. Heterodont teeth are of different types for different functions. Diphyodont teeth are in two sets, milk set and permanent set.

____ glands help in digestion of proteins, carbohydrates and fats.

Correct! Wrong!

Both intestinal juice and pancreatic juice include amylolytic, proteolytic and lipolytic enzymes that help in digestion of carbohydrates, proteins and fats respectively.

During photosynthesis in plants, oxygen is released from ____.

Correct! Wrong!

During photosynthesis in plants, photolysis of water release O2 to the atmosphere through stomata.

Stomata fails to open due to ____.

Correct! Wrong!

High concentration of CO2 closes stomata at night

The normal rate of heart beat in an adult is ____ per minute

Correct! Wrong!

Under normal conditions the human heart beats 72 times per minute.

Bile pigments are ____.

Correct! Wrong!

Bilirubin and biliverdin are the constituent pigments of the bile juice secreted by liver.

____ performs osmoregulation in human body.

Correct! Wrong!

Kidney maintains osmoregulation by regulating ionic balance in blood

Peristalsis occurs in ____.

Correct! Wrong!

Rhythmic wave of contraction passing backward over the gut wall is known as peristalsis.

Which of the following is not a food of Amoeba?

Correct! Wrong!

Amoeba is a unicellular protozoan that feeds on microscopic organisms in water. Fungi are multi cellular decomposers. Therefore, they are not a food of amoeba.

The expansion of ATP is ____.

Correct! Wrong!

Adenosine triphosphate (ATP) is the universal currency of free energy for all living cells.

Buffaloes chew the cud for ____.

Correct! Wrong!

It is a type of movement in response to food present in the oral cavity. It helps to break tough food.

The raw materials for photosynthesis are ____.

Correct! Wrong!

Carbon dioxide and water are the raw materials for photosynthesis.

During photosynthesis, ____ gas is released out from plants.

Correct! Wrong!

During photosynthesis, as a result of photolysis, oxygen is released out into the atmosphere.

____ is the correct sequence for parts of large intestine in humans.

Correct! Wrong!

Large intestine of man consists of large colon followed by rectum that opens out through anus.

____ is the substrate for amylase.

Correct! Wrong!

Cane sugar is sucrose and it is digested by the enzyme amylase.

Nutrition in fungi is ____.

Correct! Wrong!

Fungi are achlorophyllous. Hence, they show heterotrophic mode of nutrition.

The enzyme that helps in coagulation of milk in infants is present in ____.

Correct! Wrong!

The gastric juice is secreted by gastric glands of stomach in mammals like humans. Rennin is the enzyme present in the gastric juice that helps in coagulation of milk in infants.

Closely packed structures in plastids that are responsible for photosynthesis are ____.

Correct! Wrong!

Thylakoids consists of grana and stroma that are responsible for light and dark reactions of photosynthesis.

The pulmonary vein opens into ____.

Correct! Wrong!

Pulmonary vein carries oxygenated blood from the lungs to the heart and opens into the left auricle.

Chloroplasts are found in ____.

Correct! Wrong!

Chloroplasts are found in green plants only.

Xylem sap contains ____.

Correct! Wrong!

Xylem sap consists mainly of water and inorganic ions. It also contains a number of organic chemicals.

The most important pigment necessary for photosynthesis is ____.

Correct! Wrong!

Chlorophyll pigment can trap the photons from the sun light and use it for synthesis of starch.

Iodine turns blue - black on reacting with starch in leaves.

Correct! Wrong!

Iodine turns blue - black on reacting with starch. It is used to test starch synthesised by photosynthesis in leaves.

During photosynthesis, carbon dioxide from the air enter the leaves of a plant through ____.

Correct! Wrong!

During photosynthesis, carbon dioxide from the air enter the leaves of a plant through stomata.

If a plant is kept in a closed room, its daily rhythm for opening and closing of stomata ____.

Correct! Wrong!

Some plants show rhythmic opening and closing of stomata irrespective of environmental conditions. Severe drought stress or intense solar radiations induce the formation of abscisic acid that induce the closure the stomata.

The enzyme renin is secreted by ____.

Correct! Wrong!

Stomach secretes renin that digests milk protein, called casein.

Removal of the waste substances from the body is a function of skin.

Correct! Wrong!

In addition to kidneys, skin also assists in removing waste substances from the body.

CBSE Class 10th Science 6 - Life Processes MCQs
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