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Introduction to Biochemistry Quiz

Welcome to our online realm of biochemical brilliance! Dive into the fascinating world of molecules, enzymes, and cellular wonders with our “Introduction to Biochemistry Quiz.” This quiz is your gateway to unraveling the mysteries of life at the molecular level, making biochemistry accessible, engaging, and downright fun!

Introduction to Biochemistry Quiz

INTRODUCTION TO BIOCHEMISTRY

Get ready to test your knowledge in the field of Biochemistry. Please click on the right option to answer the questions. Good luck!

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1 / 40

1. Which one is the heaviest particulate component of the cell?

a. Nucleus

b. Mitochondria

c. Cytoplasm

d. Golgi apparatus

2 / 40

2. The fatty acids can be transported into and out of mitochondria through

a. Active transport

b. Facilitated transfer

c. Non-facilitated transfer

d. None of these

3 / 40

3. The surface tension in intestinal lumen between fat droplets and aqueous medium is decreased by

a. Bile Salts

b. Bile acids

c. Conc. H2SO4

d. Acetic acid

4 / 40

4. In mammalian cells rRNA is produced mainly in the

a. Endoplasmic reticulum

b. Ribosome

c. Nucleolus

d. Nucleus

5 / 40

5. All the following processes occur rapidly in the membrane lipid bilayer except

a. Flexing of fatty acyl chains

b. Lateral diffusion of phospholipids

c. Transbilayer diffusion of phopholipids

d. Rotation of phospholipids around their long axes

6 / 40

6. The pH of blood is 7.4 when the ratio between H2CO3 and NaHCO3 is

a. 1 : 10

b. 1 : 20

c. 1 : 25

d. 1 : 30

7 / 40

7. Mature erythrocytes do not contain

a. Glycolytic enzymes

b. HMP shunt enzymes

c. Pyridine nucleotide

d. ATP

8 / 40

8. The ability of the cell membrane to act as a selective barrier depends upon

a. The lipid composition of the membrane

b. The pores which allows small molecules

c. The special mediated transport systems

d. All of these

9 / 40

9. Which of the following phospholipids is localized to a greater extent in the outer leaflet of the membrane lipid bilayer?

a. Choline phosphoglycerides

b. Ethanolamine phosphoglycerides

c. Inositol phosphoglycerides

d. Serine phosphoglycerides

10 / 40

10. Which of the following statement is correct about membrane cholesterol?

a. The hydroxyl group is located near the centre of the lipid layer

b. Most of the cholesterol is in the form of a cholesterol ester

c. The steroid nucleus form forms a rigid, planar structure

d. The hydrocarbon chain of cholesterol projects into the extracellular fluid

11 / 40

11. A lipid bilayer is permeable to

a. Urea

b. Fructose

c. Glucose

d. Potassium

12 / 40

12. The following points about microfilaments are true except

a. They form cytoskeleton with microtubules

b. They provide support and shape

c. They form intracellular conducting channels

d. They are involved in muscle cell contraction

13 / 40

13. The Golgi complex

a. Synthesizes proteins

b. Produces ATP

c. Provides a pathway for transporting chemicals

d. Forms glycoproteins

14 / 40

14. The exchange of material takes place

a. Only by diffusion

b. Only by active transport

c. Only by pinocytosis

d. All of these

15 / 40

15. The average pH of Urine is

a. 7.0

b. 6.0

c. 8.0

d. 0.0

16 / 40

16. The digestive enzymes of cellular compounds are confined to

a. Lysosomes

b. Ribosomes

c. Peroxisomes

d. Polysomes

17 / 40

17. Carrier protein can

a. Transport only one substance

b. Transport more than one substance

c. Exchange one substance to another

d. Perform all of these functions

18 / 40

18. A drug which prevents uric acid synthesis by inhibiting the enzyme xanthine oxidase is

a. Aspirin

b. Allopurinol

c. Colchicine

d. Probenecid

19 / 40

19. Which are the cholesterol esters that enter cells through the receptor-mediated endocytosis of lipoproteins hydrolyzed?

a. Endoplasmin reticulum

b. Lysosomes

c. Plasma membrane receptor

d. Mitochondria

20 / 40

20. Milk is deficient of which mineral?

a. Phosphorus

b. Sodium

c. Iron

d. Potassium

21 / 40

21. Synthesis of prostaglandinsis is inhibited by

a. Aspirin

b. Arsenic

c. Fluoride

d. Cyanide

22 / 40

22. Which of the following is located in the mitochondria?

a. Cytochrome oxidase

b. Succinate dehydrogenase

c. Dihydrolipoyl dehydrogenase

d. All of these

23 / 40

23. Enzymes catalyzing electron transport are present mainly in the

a. Ribosomes

b. Endoplasmic reticulum

c. Lysosomes

d. Inner mitochondrial membrane

24 / 40

24. The cellular organelles called “suicide bags” are

a. Lysosomes

b. Ribosomes

c. Nucleolus

d. Golgi’s bodies

25 / 40

25. Fatty acids can be transported into and out of cell membrane by

a. Active transport

b. Facilitated transport

c. Diffusion

d. Osmosis

26 / 40

26. Which one is the largest particulate of the cytoplasm?

a. Lysosomes

b. Mitochondria

c. Golgi apparatus

d. Entoplasmic reticulum

27 / 40

27. Oxidation of which substance in the body yields the most calories

a. Glucose

b. Glycogen

c. Protein

d. Lipids

28 / 40

28. The absorption of intact protein from the gut in the foetal and newborn animals takes place by

a. Pinocytosis

b. Passive diffusion

c. Simple diffusion

d. Active transport

29 / 40

29. The degradative Processess are categorized under the heading of

a. Anabolism

b. Catabolism

c. Metabolism

d. None of the above

30 / 40

30. From the biological viewpoint, solutions can be grouped into

a. Isotonic solution

b. Hypotonic solutions

c. Hypertonic solution

d. All of these

31 / 40

31. The following substances are cell inclusions except

a. Melanin

b. Glycogen

c. Lipids

d. Centrosome

32 / 40

32. Mitochondrial DNA is

a. Circular double stranded

b. Circular single stranded

c. Linear double helix

d. None of these

33 / 40

33. The most active site of protein synthesis is the

a. Nucleus

b. Ribosome

c. Mitochondrion

d. Cell sap

34 / 40

34. Bulk transport across cell membrane is accomplished by

a. Phagocytosis

b. Pinocytosis

c. Extrusion

d. All of these

35 / 40

35. The power house of the cell is

a. Nucleus

b. Cell membrane

c. Mitochondria

d. Lysosomes

36 / 40

36. The phenomenon of osmosis is opposite to that of

a. Diffusion

b. Effusion

c. Affusion

d. Coagulation

37 / 40

37. Which of the following is required for crystallization and storage of the hormone insulin?

a. Mn++

b. Mg++

c. Ca++

d. Zn++

38 / 40

38. Milk is deficient in which vitamins?

a. Vitamin C

b. Vitamin A

c. Vitamin B2

d. Vitamin K

39 / 40

39. Genetic information of nuclear DNA is transmitted to the site of protein synthesis by

a. rRNA

b. mRNA

c. tRNA

d. Polysomes

40 / 40

40. HDL is synthesized and secreted from

a. Pancreas

b. Liver

c. Kidney

d. Muscle

Your score is

The average score is 51%

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Students: Reinforce classroom learning and test your biochemistry knowledge in a dynamic online environment.
Educators: Use the quiz as a supplemental resource to engage students and reinforce key concepts.
Lifelong Learners: Explore the wonders of biochemistry in a user-friendly format, perfect for those curious minds outside the classroom.

frequently asked questions (FAQ) list about the introduction to biochemistry:

Q1: What is biochemistry? A1: Biochemistry is the branch of science that explores the chemical processes within and related to living organisms. It involves the study of molecules and chemical reactions that occur in biological systems.

Q2: Why is biochemistry important? A2: Biochemistry is crucial for understanding the molecular mechanisms of life. It provides insights into the structure and function of biological molecules, helping to unravel the complexities of cellular processes and contributing to advancements in medicine, agriculture, and biotechnology.

Q3: What are the main biomolecules studied in biochemistry? A3: The primary biomolecules studied in biochemistry are proteins, nucleic acids (DNA and RNA), lipids, and carbohydrates. These molecules play essential roles in the structure and function of living organisms.

Q4: How are proteins important in biochemistry? A4: Proteins are vital macromolecules that serve various functions in cells, including enzymatic catalysis, structural support, transport, and signaling. They are essential for the structure and function of cells and are involved in virtually every biological process.

Q5: What is the central dogma of biochemistry? A5: The central dogma of biochemistry describes the flow of genetic information within a biological system. It states that DNA encodes RNA, which, in turn, encodes proteins. This process is crucial for the synthesis of functional proteins in cells.

Q6: How does biochemistry relate to metabolism? A6: Biochemistry is closely linked to metabolism, the set of chemical reactions that occur within living organisms to maintain life. Biochemical processes, such as glycolysis and cellular respiration, are central to understanding how cells generate and utilize energy.

Q7: What is the role of enzymes in biochemistry? A7: Enzymes are biological catalysts that facilitate and accelerate biochemical reactions in living organisms. They play a crucial role in regulating metabolic pathways and maintaining cellular homeostasis.

Q8: How does biochemistry contribute to medicine? A8: Biochemistry provides the foundation for understanding the molecular basis of diseases. It is essential for drug development, diagnostic techniques, and the study of biochemical pathways implicated in various medical conditions.

Q9: What are the key techniques used in biochemistry research? A9: Biochemists employ a range of techniques, including chromatography, electrophoresis, mass spectrometry, and various spectroscopic methods, to analyze and characterize biological molecules.

Q10: How has biochemistry evolved over time? A10: Biochemistry has evolved significantly, from its roots in organic chemistry and physiology to a multidisciplinary field integrating molecular biology, genetics, and biophysics. Advances in technology have revolutionized the study of biomolecules and their functions.

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