The enzyme that breaks down fats in the digestive system is: MCQ with Answer and Explanation

The enzyme that breaks down fats in the digestive system is:
A. Lipase
B. Sucrase
C. Pepsin
D. Amylase
Answer: Option A
Solution (By JKSSB Mock Tests)
Lipase, primarily pancreatic lipase, hydrolyzes triglycerides into monoglycerides and free fatty acids in the small intestine, aided by bile salts that emulsify fats. Amylase digests starch, pepsin proteins, sucrase sucrose. Lipases are also secreted by lingual and gastric glands but pancreatic lipase is the main.

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Practice More Biology Questions

Question #1
Which of the following is a defining characteristic of all Chordates?
A. Ventral nerve cord
B. Open circulatory system
C. Presence of a notochord at some stage of life
D. Exoskeleton made of chitin

Correct Answer: Option C


Explanation:
All chordates, at some point during their larval or adult stages, possess three key features: a dorsal hollow nerve cord, a notochord (a flexible rod supporting the body), and pharyngeal slits. The notochord may be replaced by a vertebral column in vertebrates. Arthropods have a ventral nerve cord and open circulatory system.

This question belongs to: Science Biology
Question #2
Crossing over between homologous chromosomes occurs during which sub-stage of Prophase I in meiosis?
A. Zygotene
B. Pachytene
C. Diplotene
D. Leptotene

Correct Answer: Option B


Explanation:
Prophase I of meiosis is divided into five sub-stages: leptotene, zygotene, pachytene, diplotene, and diakinesis. Crossing over, the exchange of genetic material between non-sister chromatids of homologous chromosomes, occurs specifically during the pachytene stage at structures called recombination nodules.

This question belongs to: Science Biology
Question #3
During inspiration, the diaphragm:
A. Relaxes and becomes dome-shaped
B. Moves laterally
C. Contracts and flattens
D. Remains unchanged

Correct Answer: Option C


Explanation:
Inspiration (inhalation) occurs when the intra-pulmonary pressure is less than the atmospheric pressure. This is achieved by the contraction of the diaphragm, which flattens and moves downwards, and the contraction of external intercostal muscles, which lift the ribs and sternum. This increases the thoracic volume and lung capacity, drawing air in. Expiration involves relaxation of these muscles.

This question belongs to: Science Biology