WorksheetsLife Processes (Introduction)
Total questions: 25
Worksheet time: 15mins
Photosynthesis occurs in
ribosomes
chloroplasts
mitochondria
vacuole
Which of the following statements about the autotrophs is incorrect
They synthesize glucose 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 levels in the food chain
Which of the statements is incorrect with reference to photosynthesis
Chloroplast traps the incident radiations of sunlight
Oxygen is reduced to carbohydrates
Water gets oxidised to release molecular oxygen
Carbon dioxide gets reduced to carbohydrates
Exchange of gases in plants mostly occurs through
xylem
phloem
guard cells
stomata
The secretion of this gland is non enzymatic, but aids in digestion of food
Pancreas
Stomach
Liver
Small intestine
The C- shaped region of small intestine that receives the pancreatic secretion and bile is
caecum
ileum
duodenum
jejunum
The major protein digesting enzyme in stomach is
trypsin
pepsin
lipase
amylase
Digestion of fat gets completed in
small intestine
large intestine
stomach
pancreas
Most of the carbohydrates gets digested in the
Small intestine
stomach
mouth
oesophagus
Inactive pepsin is converted into active pepsin by the secretion of
Bile
Pancreatic juice
Hydrochloric acid
Acetic acid
Bile juice helps in
making the medium acidic in stomach
making the medium basic in stomach
making the medium acidic in small intestine
making the medium basic in small intestine
Choose the correct statement in relation to the functions of the enzyme trypsin
It converts lipids into fatty acid and glycerol
it brings about emulsification of fat
It converts peptones into peptides
It is an inactive enzyme present in stomach
Name the component of gastric juice that protects the stomach walls from the corrosive nature of hydrochloric acid
Ciliated epithelium
Squamous epithelium
Stratified epithelium
Mucus
Select the correct statement
heterotrophs synthesize their own food
heterotrophs use solar energy for photosynthesis
heterotrophs do not synthesize their own food
heterotrophs are capable of converting carbon dioxide and water into carbohydrates
Choose the event that does not occur during photosynthesis
absorption of light energy by chlorophyll
reduction of carbon dioxide to carbohydrates
oxidation of carbon to carbondioxide
conversion of light energy into chemical energy
The enzyme secreted by pancreas that acts on fat is
Lipase
Pepsin
Amylase
Trypsin
The end product of digestion of proteins is
fatty acid
amino acid
imino acid
oleic acis
Which among the following is not a digestive gland
Liver
Pancreas
Kidney
Small intestine
Peristalsis of food occurs in which region of the alimentary canal
Pharynx
Oesophagus
Anus
Rectum
The process of egestion of undigested food occurs in the
large intestine
mouth
small intestine
stomach
Which among the following is not associated with small intestine
Villi
Lacteals
colon
ileum
How many salivary gland are present in humans?
3
6
2
4
The entry of food into the respiratory pathway is prevented by the presence of
epiglottis
glottis
cartilage
mucus
The major carbohydrate digesting enzyme is
Amylase
Lipase
Pepsin
Trypsin
Emulsification of fat takes place in
Liver
Pancreas
Small intestine
Large intestine
