All Free Biology MCQs with Answers
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19,844 questions · page 905 of 993
- A. They are conjugated molecules of carbohydrates
- B. Both have role in the extracellular matrix of animals and bacterial cell wall
- C. They are components of biological membranes.
- D. Both are produced and screted by endoplasmic reticulum
Explanation: Addition of sugars to protiens and lipids occurs in the golgi body, not in the endoplasmic reticulum.
Correct answer: Both are produced and screted by endoplasmic reticulum- A. They are conjugated molecules of carbohydrates
- B. Both have a role in extracellular matrix of animal and bacterial cell wall
- C. They are components of biological membranes
- D. Both are produced and seceted by the endoplasmic reticulum
Explanation: Proteins and lipids themselves are formed in rough and smooth endoplasmic reticulum respectively, but their conjugation with carbohydrates…
Correct answer: Both are produced and seceted by the endoplasmic reticulum- A. Starch
- B. Haemoglobin
- C. Lecithin
- D. Mucin
Explanation: One example of glycoproteins found in the body is mucins, which are secreted in the mucus of the respiratory and digestive tracts.
Correct answer: Mucin18084. Role of lysosomes are:
- A. Hydrolytic enzymes
- B. Autophagy
- C. Destruction of cell
- D. All of these options
Explanation: Lysosomes are single membranous, spherical vesicles. They contain digestive or hydrolytic enzymes that digest various substances.
Correct answer: All of these options- A. These are spherical bodies surrounded by a single membrane
- B. They are responsible for autolysis of the cells
- C. They originate from the Golgi apparatus
- D. Tay Sach's disease is caused due to excess of lysosomal enzymes
- E. They occur only in cytoplasm of animal cells
Explanation: Explanation for this question will be added soon.
Correct answer: Tay Sach's disease is caused due to excess of lysosomal enzymes- A. Mitochondria
- B. Peroxisomes
- C. Lysosomes
- D. Golgi bodies
- E. Nucleus
Explanation: Explanation for this question will be added soon.
Correct answer: Peroxisomes- A. Endoplasmic reticulum
- B. Cytoplasm
- C. Chloroplasts
- D. Mitochondria
- E. Nucleus
Explanation: Explanation for this question will be added soon.
Correct answer: Chloroplasts- A. Synthesis of proteins
- B. Defence of cell
- C. Packaging of proteins
- D. Digestion of macromolecules
- E. Detoxification of alcohol
Explanation: Explanation for this question will be added soon.
Correct answer: Packaging of proteins- A. Protein & Lipid
- B. Protein & RNA
- C. RNA & Lipid
- D. RNA & Carbohydrates
Explanation: Option A: Protein & Lipid: Ribosomes are not composed of almost equal amounts of protein and lipid.
Correct answer: Protein & RNA18090. Porins are present in:
- A. Mitochondria and golgi apparatus
- B. Mitochondria and chloroplast
- C. Mitochondria and ribosomes
- D. Golgi apparatus and chloroplast
Explanation: Porins are present in the outer membrane of mitochondria and the outer chloroplast membrane.
Correct answer: Mitochondria and chloroplast- A. Endoplasmic reticulum
- B. Ribosomes
- C. Lysosomes
- D. Cell wall
Explanation: Lysosomes are also refered as the dustbin of the cell. They contain hydrolytic enzymes for the breakdown of the cell wastes.
Correct answer: Lysosomes- A. Endoplasmic reticulum
- B. Lysosomes
- C. Mitochondria
- D. Ribosomes
Explanation: It is a self replicating organelle which contains its own DNA and synthesises its own proteins.
Correct answer: Mitochondria- A. Ribosomes
- B. Nuclear membrane
- C. Plasmids
- D. Golgi apparatus
Explanation: The Golgi and plasma membranes are the two main sites where constituents of cell wall are synthesized.
Correct answer: Golgi apparatus- A. Rough endoplasmic reticulum
- B. Smooth endoplasmic reticulum
- C. Golgi apparatus
- D. Ribosomes
Explanation: SER is responsible for the synthesis of hormones and steroids. It also plays a major role in detoxication.
Correct answer: Smooth endoplasmic reticulum- A. Smooth endoplasmic reticulum
- B. Rough endoplasmic reticulum
- C. Golgi apparatus
- D. Ribosomes
Explanation: SER is responsible for 1. Hormone and steroids synthesis 2. Detoxification 3. Impulse transmission.
Correct answer: Smooth endoplasmic reticulum- A. Lysosome
- B. Golgi complex
- C. Vacuole
- D. Centrioles
Explanation: Golgi apparatus is often regarded as the secretary organelle of the cell.
Correct answer: Golgi complex- A. Nucleus
- B. Miitochondria
- C. Lysosome
- D. Vacuole
Explanation: The ATP synthases comprise a very large group of highly conserved enzymes that are found in the bacterial cytoplasmic membranes, the…
Correct answer: Miitochondria- A. Mitochondria
- B. Golgi bodies
- C. Lysosome
- D. Chloroplast
Explanation: A lysosome is a membrane-bound organelle found in many animal cells. They are spherical vesicles that contain hydrolytic enzymes that can…
Correct answer: Lysosome- A. Ribosome
- B. mRNA
- C. Protein
- D. Enzymes
Explanation: The nucleolus is a spherical structure found in the cell's nucleus whose primary function is to produce and assemble the cell's ribosomes.
Correct answer: Ribosome- A. Seven Triplets
- B. Eleven Triplets
- C. Nine Triplets
- D. Five Triplets
Explanation: Each centriole is composed of Nine Triplets of Microtubules
Correct answer: Nine Triplets