GENERAL HISTOLOGY

INTRODUCTION

CELL ORGANELLES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This organelle breaks down (digest) worn out cell parts
A
cytoplasm
B
lysosomes
C
mitochondria
D
vacuoles
Explanation: 

Detailed explanation-1: -Lysosomes are membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers-proteins, nucleic acids, carbohydrates, and lipids.

Detailed explanation-2: -A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.

Detailed explanation-3: -Lysosomes break down macromolecules into their constituent parts, which are then recycled. These membrane-bound organelles contain a variety of enzymes called hydrolases that can digest proteins, nucleic acids, lipids, and complex sugars. The lumen of a lysosome is more acidic than the cytoplasm.

Detailed explanation-4: -Lysosomes have powerful enzymes and acids to digest and recycle cell materials. Credit: Judith Stoffer. Proteins aren’t the only type of cellular waste. Cells also have to recycle compartments called organelles when they become old and worn out.

Detailed explanation-5: -Lysosomes contain portions of cytoplasmic components such as glycogen, mitochondria, or cisternae of the endoplasmic reticulum. Hydrolytic enzymes (phosphatases and proteases) provide intracellular digestion of worn-out cellular organelles and materials taken into the cell by endocytosis.

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