Biology MCQs (Multiple Choice Questions) with answers for various state exams and UPSC civil services, SSC, banking, MPSC, UPPSC, MPPSC etc. Competitive Exams. Learn and prepare Objective type Questions on Biology.
1. The process of breakdown of glucose to pyruvic acid is called?
Glycolysis.
C4 pathway.
Breathing.
Calvin cycle.
Answer: (a) Glycolysis.
Solution: The process of breakdown of glucose into pyruvic acid is called glycolysis. It occurs in the cytoplasm of the cell and is present in all living organisms. In this process, glucose undergoes partial oxidation to form two molecules of pyruvic acid.
2. Which among the following prevents, fruits and leaves from falling at the early stage?
Gibberellins.
Cytokinins.
Auxins.
Ethylene.
Answer: (c) Auxins.
Solution: The auxins are produced by the growing apices of the stems and roots. It helps to prevent fruit and leaves drop at an early stage but promotes the abscission of older mature leaves and fruits.
3. The innermost layer lining the lumen of the alimentary canal is called
Villi
Mucosa.
Serosa.
Muscularis.
Answer: (b) Mucosa.
Solution: The wall of the alimentary canal possesses four layers namely serosa, muscularis, submucosa, and mucosa. The innermost layer lining the lumen of the alimentary canal is called the mucosa.
4. Which is the largest gland of the body?
Heart.
Kidney.
Skin.
Liver.
Answer: (d) Liver.
Solution: The liver is the largest gland of the body in an adult human. It is situated in the abdominal cavity, below the diaphragm, and has two lobes.
5. The bile secreted from the liver is stored in
Gall bladder.
Pancreas.
Stomach.
Small intestine.
Answer: (a) Gall bladder.
Solution: The bile secreted by the hepatic cells of the liver passes through the hepatic duct. It is stored and concentrated in a thin muscular sac called the gallbladder.