1. Which of the following protects the body against infectious disease and foreign invaders?
[A] Leukocytes
[B] Red blood cells
[C] Endoplasmic reticulum (ER)
[D] Golgi apparatus
Show Answer
Correct Answer: A [Leukocytes]
Notes:
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells.
2. Which among the following is a millet?
[A] Sorghum
[B] Maize
[C] Wheat
[D] Rice
Show Answer
Correct Answer: A [Sorghum]
Notes:
Millets are a group of highly variable small-seeded grasses, widely grown around the world as cereal crops or grains for fodder and human food. It is usually considered a separate cereal, but sometimes also known as great millet.
3. Corpus Callosum makes an important part of which among the following organs in Human body?
[A] Brain
[B] Liver
[C] Kidney
[D] Spinal Chord
Show Answer
Correct Answer: A [Brain]
Notes:
The corpus callosum is a large, C-shaped nerve fiber bundle which is found beneath the cerebral cortex. It stretches across the midline of the brain. IT connects the left and right cerebral hemispheres.
4. Pearls are primarily composed of which of the following substances?
[A] Protein
[B] Calcium Carbonate
[C] Silica
[D] Sodium Carbonate
Show Answer
Correct Answer: B [Calcium Carbonate]
Notes:
Pearls are composed primarily of calcium carbonate, which is what gives them their unique luster. They are formed within the shell of certain mollusks as a defense mechanism against a potentially threatening irritant, such as a parasite. Over time, the mollusk continually deposits layers of calcium carbonate, which eventually forms a smooth, hard pearl. This process can take up to eight years.
5. What do we call the roots of some orchid plants, which hang in the air and absorb moisture from it?
[A] Assimilatory Roots
[B] Epiphytic Roots
[C] Sucking Roots
[D] Stilt Roots
Show Answer
Correct Answer: B [ Epiphytic Roots]
Notes:
Epiphytic roots are the roots of some orchid plants, which hang in the air and absorb moisture and nutrients from the air, rain water. Examples of epiphytic roots are mosses, liverworts, lichens, and algae of temperate zone and ferns, cacti, orchids, and bromeliads in the tropics.
6. As compared to Photosynthesis, the Chemosynthesis involves CO2 fixation using energy derived from __:
[A] Oxidation of inorganic molecules
[B] Sunlight
[C] Ultraviolet radiation
[D] Infra Red radiation
Show Answer
Correct Answer: A [ Oxidation of inorganic molecules]
Notes:
Some organisms are able to convert inorganic material into organic compounds by a process called Chemosynthesis. This involves oxidation of inorganic molecules (e.g. hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight, as in photosynthesis.
7. Which of the following statements is incorrect about Down syndrome?
[A] It is a genetic disorder
[B] It is typically associated with physical growth delays
[C] There is no cure for Down syndrome
[D] It impairs the body’s ability to make blood clots
Show Answer
Correct Answer: D [ It impairs the body’s ability to make blood clots]
Notes:
Down syndrome mainly affects hearing, vision, the circulatory system and the bone systems.
8. Which of the following statements is incorrect about large intestine?
[A] It secretes a number of hormones
[B] Villi is absent in large intestine
[C] It takes part in the absorption of water from the indigestible residue
[D] The colon is also called the large intestine
Show Answer
Correct Answer: A [ It secretes a number of hormones]
Notes:
First statement is incorrect because secretion of hormones is absent in large intestine. Small intestine secretes hormones. Other three statements are correct.
9. Who coined the term “Tissue culture”?
[A] Montrose Thomas Burrows
[B] Jack Kevorkian
[C] Charles Scott Sherrington
[D] Ludvig Hektoen
Show Answer
Correct Answer: A [Montrose Thomas Burrows]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium separate from the organism. It refers to the culture of animal cells and tissues, with the more specific term plant tissue culture being used for plants. The term “tissue culture” was coined by American pathologist Montrose Thomas Burrows.
10. Which movements of “Touch me not plant” lead to closing of its leaves when touched?
[A] Nyctinastic movements
[B] Seismonastic movements
[C] Chemonastric movements
[D] Photonastic movements
Show Answer
Correct Answer: B [Seismonastic movements]
Notes:
Seismonastic Movement is caused by the mechanical stimuli like shock, touch, fast moving wind, etc. Mimosa pudica is a perennial herb which is also known as the touch me not plant or the sensitive plant, is well-known for closing its leaves (or folding its leaves inwards) when touched.
