Q1. Animal protein is called first class protein because it is –
(a) Easily digestible
(b) Delicious in taste
(c) Cheaper in the market
(d) Rich in essential amino acids
Q2.Nephron is related to which of the following system of human body?
(a) Circulatory system
(b) Excretory system
(c) Reproductive system
(d) Respiratory system
Q3. What is the name of the hormone produced by thymus gland?
Q4. In females, the ovaries are located ______ on each side of the lower abdomen.
Q5. The vitamin which is generally excreted by humans in urine is
(a) Vitamin A
(b) Vitamin D
(c) Vitamin C
(d) Vitamin E
Q6. The beetroot is the _________ portion of the beet plant.
(a) Tap root
(c) Bulb of the stem
Q7. What is the basic unit of heredity?
Q8.Which of the following is a structural and functional unit of kidneys?
(a) Renette Cells
(b) Flame Cells
Q9.Which of the following is the largest part of the human brain?
Q10.The auxiliary buds _____.
(a) Grow endogenously from the pericycle
(b) Arise endogenously from the main growing point
(c) Is an embryonic shoot located in the axil of a leaf
(d) Arise exogenously from the epidermis
Sol. Proteins from animals are called ‘first class’ proteins – they provide all the essential amino acids, including those that the body can’t make. Proteins from plants are ‘second class’ proteins.
Sol. A nephron is the basic structural and functional unit of the kidney which is part of excretory system. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
Sol. The thymus gland produces and secretes thymosin, a hormone necessary for T cell development and production. The thymus is special in that, unlike most organs, it is at its largest in children. Once you reach puberty, the thymus starts to slowly shrink and become replaced by fat.
Sol. The ovaries are two oval-shaped organs that lie to the upper right and left of the uterus. In other words, the ovaries are located one on each side of the lower abdomen.
Sol. The vitamin which is generally excreted by humans in urine is Vitamin C.
Sol. The beetroot is the taproot portion of the beet plant.
Sol. A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins.
Sol. A nephron is the structural and functional unit of the kidney. A nephron is used separate to water, ions and small molecules from the blood, filter out wastes and toxins, and return needed molecules to the blood.
Sol. The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action. The cerebral cortex is divided into four sections, called “lobes”: the frontal lobe, parietal lobe, occipital lobe, and temporal lobe.
Sol. The axillary bud is a bud that develops in the axil of a leaf of a plant. Axillary buds develop from the nodes which then becomes a new stem. Sometimes from axillary buds instead of branches (axillary shoot) also arise flowers, these buds are called floral buds.
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