Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology biology : an introduction characteristics of life living world and classification attributes of living organisms

All living things perform the action of 

  1. Eating

  2. Growing

  3. Breathing

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
All living things show following distinguished characters
  • Reproduction and metabolism
  • Response to stimuli.
  • Growth and development.
  • Adaptation through evolution
For showing these characters they perform an act of eating, growing, adapting, moving and breathing.
Hence the option D "all of the above" is correct.
Multiple choice biology biology : an introduction characteristics of life living world and classification attributes of living organisms

Fish breathe through

  1. Gills

  2. Lungs

  3. Stomata

  4. Skin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In aquatic animals such as fish, respiration takes place through special respiratory organs called gills. Gills are present on lateral sides of the head of fish. It is made of gill filaments present on gill arches which are heavily supplied with blood capillaries for an exchange of gases. the filaments increase the area of absorption.
Hence the correct option is A "gills".
Multiple choice biology the leaf morphology of leaf structure of a leaf basics of leaf and flower

Main function of leaf is _____.

  1. Transpiration

  2. Exchange of gases

  3. Photosynthesis

  4. Cooling
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The main function of leaf is photosynthesis. It produces food for the plant. It has a photosynthetic pigment chlorophyll which converts solar energy into chemical energy. The leaf is also involved in the transpiration process. The transpiration process helps in cooling of plant. The exchanges of gases takes place through stomata present on the leaves.

Thus, the correct answer is 'Photosynthesis.'

Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

Saliva contains .......... enzyme which hydrolyses starch into 

  1. Hydrolase, maltase

  2. Amylase, maltose

  3. Amylose, kinase

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The digestion of food begins at the mouth where the saliva is secreted by the salivary gland that contains an enzyme called as salivary amylase enzyme which hydrolyzes starch into maltose but the complete digestion of starch occurs only in the small intestine by the action of pancreatic amylase. 

Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

If you chew on a piece of bread long enough, it will begin to taste sweet because

  1. maltase is breaking down maltose

  2. lipases are forming fatty acids

  3. amylase is breaking down starches to disaccharides

  4. disaccharides are forming glucose.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When you chew a piece of bread long enough, it will begin to taste sweet because amylase breaks down the starch to disaccharides.  

So the correct option is C.

Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

Emulsification of facts is done by-

  1. Saliva

  2. bile

  3. gastric juices

  4. intestinal juices
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chemical digestion takes place as lingual lipase, an enzyme in your saliva, begins to emulsify fat and saliva moistens the food to make it easier to swallow. When the food reaches your stomach, the muscles there begin to churn and move to further break it down. So the correct option is 'Saliva'.