Biology is the study of living organisms. Biology assignments can be solved by the thorough study of botany, zoology, and microbiology. Biology assignment from professionals can make your task easy. Here are some questions and answers are given for the students to have an idea how to solve their assignments and homework before taking any multiple choice test.

Q1. Which protein is a biological catalyst?

Ans. Enzymes are the proteins which are known as biological catalysts. These enhance the rate of any biological reactions.

Q2. Are cellulose and glycogen monosaccharide or polysaccharide?

Ans. Cellulose and glycogen are polysaccharides as they are made up of repeated units called monosaccharide. Cellulose is a structural polysaccharide whereas glycogen is a storage polysaccharide.

Q3. Which theory does the following statement describe: “New cells are formed in consequence of a mother cell division”?

Ans. The theory which supports the above statement is called the Modern Cell Theory or the Cell Principle. It says that every cell originates from the division of pre-existing cells.

Q4. Why do arthropods need chitin?

Ans. Arthropods need chitin for protection. Chitin is a highly resistant substance which protects the arthropods from extreme environmental conditions. This is the reason why arthropods survive in the most inhospitable environment.

Q5. Which organic compounds are stored in the liver?

Ans. There are many organic compounds which are stored in the liver. Most abundant is the glycogen. Other compounds are vitamins, hormones, bile juice etc.

Q6. What functions does the thyroid gland perform?

Ans. The thyroid gland is located in front of the neck surrounding the voice box or larynx. It is an endocrine gland which secretes thyroxin hormone which controls the metabolism. A slight imbalance in the secretion of the hormone i.e. hyposecretion or hypersecretion may cause the disturbance in metabolism. One can get very lean or very obese due to this imbalance.

Q7. In which case is the group of prokaryotes called anaerobic?

Ans. When the prokaryotes perform respiration in the absence of oxygen, they are called anaerobic. This respiration is also called fermentation.

Q8. What is the structure of arteries?

Ans. Arteries are blood vessels which carry blood away from the heart. They consist of different layers and are thicker than the other blood vessels called veins. Tunica adventitia is the outermost layer. The middle layer is being tunica media which is a muscular layer. The innermost layer is tunica internal. It is thin and elastic. The artery is capable of being contraction and relaxation due to these layers.

Q9. What is the quantity of a crocodile’s heart chambers?

Ans. A crocodile is an exception in all the reptiles in having a full four-chambered heart. All other reptiles have an incomplete septum in the ventricle. A crocodile’s heart has four chambers i.e. two atria and two ventricles. It resembles the heart of birds and mammals which also have four-chambered hearts.

Q10. Which blood type does a “universal recipient” have?

Ans. A universal recipient has a blood group “AB –ve”. He is called universal recipient because he can give blood to any other blood group. This is because its blood does not contain any antigen which reacts with the antibodies present in other groups.

Q11. Can you give an example of phenotypic plasticity?

Ans. When the phenotype or appearance of an organism changes with the environment is called phenotypic plasticity e.g. shape of leaves depends upon the temperature of that area.

Q12. Which layer of the wall of the heart is comprised of cardiac muscle tissue?

Ans. The walls of ventricles consist of cardiac muscle tissue.

Q13. Which enzyme catalyzes the hydrolysis of lipids?

Ans. Lipase enzyme catalyzes the hydrolysis of lipids.

Q14. How many canine teeth do most of the adults have?

Ans. There are 32 teeth in most of the human adults.

Q15. Can you name a polysaccharide that cumulates in the liver?

Ans. Glycogen accumulates in the liver.

Q16. What other main respiratory organs do birds have except lungs?

Ans. The birds have air sacs other than lungs as respiratory organs.

Q17. How are erythrocytes produced?

Ans. Erythrocytes are produced in bone marrow.

Q18. What is a macula and which functions does it perform?

Ans. It is part of the retina of human eye where the sharpest image is formed.

Q19. What is the mechanism of the acquired reflex development?

Ans. Acquired reflex is developed by learning and practice. It gets reduced by reduction in practice.

Q20. What are main functions of the cerebellum?

Ans. The cerebellum is the main part of the brain which controls equilibrium of the body.

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