Biochemistry is a fascinating subject to explore, and the Punjab Board Chemistry Notes Class 10 Notes Chapter 13 can provide an engaging and thorough look into the field. With multiple-choice questions, long and short questions, and MCQs, learners can deepen their understanding of the subject and gain a better appreciation for the complexity of biochemistry. The downloadable PDF includes detailed explanations and examples that further illustrate the concepts discussed, making it easier for students to comprehend the material. With these resources, learners can confidently approach the biochemistry section of their exams and gain a better understanding of the field.
Biochemistry Punjab Board (PCTB) Chapter 13 in Pdf for All Boards
Biochemistry is the branch of chemistry that focuses on the chemical processes that occur in living organisms. It is a multidisciplinary field that combines elements of biology, chemistry, and physics to study the complex biochemical processes that occur in living systems.
Biochemistry is essential to understanding the fundamental processes of life, such as metabolism, respiration, and photosynthesis. It helps us to understand how molecules interact in biological systems and how they can be manipulated to develop new treatments for diseases.
One of the primary goals of biochemistry is to understand the structure and function of proteins, which are essential for many biological processes. Proteins are made up of amino acids that are linked together by peptide bonds. The sequence of amino acids determines the shape and function of the protein.
Biochemists also study enzymes, which are proteins that catalyze biochemical reactions. Enzymes play a crucial role in metabolism, and understanding their structure and function is essential for developing new drugs and treatments for diseases.
Carbohydrates are another important class of biomolecules studied in biochemistry. They are essential for providing energy to the body and are also involved in cellular signaling and communication. Lipids are another important class of biomolecules that play a crucial role in membrane structure and function and energy storage.
Biochemistry also plays a crucial role in understanding genetic information and the processes of DNA replication and transcription. The study of genetics has led to the development of recombinant DNA technology, which has revolutionized the production of proteins and other biomolecules.
Biochemistry has many practical applications in medicine, agriculture, and biotechnology. Biochemists work to develop new drugs and treatments for diseases, design new crops with improved nutritional content, and develop new methods for producing biofuels and other renewable energy sources.
In conclusion, biochemistry is a diverse and complex field that is essential to understanding the chemical processes that occur in living organisms. It has many practical applications in medicine, agriculture, and biotechnology and plays a crucial role in developing new treatments for diseases and improving the sustainability of our planet.
Where are the proteins found?
Proteins are present in all living organisms throughout their bodies. They are major components of all cells and tissues of animals. Over 10,000 different proteins are found and needed in the body for maintaining life. They are found in muscles, bones, skin, hair, and virtually every other body part.
Describe the uses of carbohydrates.
Uses of carbohydrates
(i) Carbohydrates provide energy for working muscles.
(ii) They regulate the amount of sugar level in our body.
(iii) They provide fuel for the central nervous system.
(iv) They help muscles of the intestines to move food efficiently through the digestive tract.
(v) They help in lowering cholesterol and regulating blood pressure.
How do plants synthesize carbohydrates?
Answer:
Plants synthesize carbohydrates from carbon dioxide and water by photosynthesis in the presence of sunlight and green pigment chlorophyll.
Give the characteristics of monosaccharides
Characteristics of monosaccharides
(i) They are the simplest form of sugar.
(ii) They are usually white crystalline solids.
(iii) They are sweet in taste.
(iv) They are soluble in water.
(v) They are reducing in nature.
Give an example of a disaccharide. How it is hydrolyzed or monosaccharides.
Carbohydrates which on hydrolysis produce two monosaccharides are called disaccharides. Lactose is a disaccharide of glucose and galactose i.e. it produces two monosaccharides on hydrolysis as shown below:
C12H22O12 + H2O → C6H12O6 + C6H12O6
Lactose Glucose Galactose
Why the ten amino acids are essential for us?
The ten amino acids are essential for us because, unlike non-essential amino acids, they cannot be synthesized by our body. As a result, they must come from food.
How are proteins formed?
A protein molecule is made from a long chain of amino acids, each linked to its neighbour through a covalent peptide bond with a loss of water molecule. The carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of the second amino acid.
How is gelatin obtained?
Gelatin is a protein obtained by heating bones and tendons in water.
Give the general formula of the lipids.
The general formula of lipids is:
Name two fatty acids with their formulae
Butyric acid: C3H7COOH
Palmitic acid: C15H31COOH
Give the types of vitamins.
Types of vitamins
There are two types of vitamins.
(i) Water-soluble vitamins
Water-soluble vitamins dissolve in water. These vitamins are carried to the body’s tissues but are not stored in the body. If taken in excess, they are readily excreted from the body. Hence, they are not toxic even if taken in excess.
Examples: Vitamin B complex and Vitamin C
(ii) Fat-soluble vitamins
Fat-soluble vitamins dissolve in fat. Taking a large quantity of these vitamins can cause diseases. However, their deficiency can also be harmful.
Examples: Vitamin A, D, E and K.
What is the significance of vitamins?
Significance of vitamins
Vitamins are used in many different ways inside our bodies. They boost the immune system, support normal growth and development and help cells and organs do their jobs. Overall, vitamins make bodies work properly. While vitamins do not directly serve as a source of energy, they do help the enzymes that generate energy from nutrients such as carbohydrates and fats.
Describe the sources and uses of vitamin A.
Sources of vitamin A
High vitamin A foods include milk, butter, eggs, oils and fats, fish. It is also found in fresh green vegetables, carrots and liver.
Uses of vitamin A
Vitamin A supports healthy eyesight, immune function, skin, bones and teeth.
What do you mean by the genetic code of life?
The genetic code is the set of rules by which information stored in DNA is passed as instructions from generation to generation on how to synthesize particular proteins from amino acids. This information determines whether an organism is a man, donkey or a tree. It also determines the type of cell.
What is the function of DNA?
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. It contains all the information for making a complete individual. All known cellular life and some viruses contain DNA. The main role of DNA is the storage of information and its transmission to next generations.
