Question 1

Which one of the following has a bilateral symmetry in its body organization?

Accepted Answer

Asterias has bilateral symmetry only at larval stagebut fivefold symmetry (pentamerism, a special type of radial symmetry) as adults. Nereis do not possess any symmetry elements in their body organisation.

Question 2

Which one of the following statements regarding haemoglobin is correct?

Accepted Answer

During respiration, about 97% of oxygen is transported by Red Blood Cells in blood and the remaining 3% gets dissolved in the plasma.Around 20-25% of carbon dioxide is carried by haemoglobin as carbamino-haemoglobin. Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.

Question 3

Which one of the following statements is correct?

Accepted Answer

Urea is produced in the liver and is a metabolite (breakdown product) of amino acids. Ammonium ions are formed in the breakdown of amino acids. Some are used in the biosynthesis of nitrogen compounds. Excess ammonium ions are converted to urea.

Question 4

Which of the following disease is caused by female Anopheles mosquito?

Accepted Answer

Black Fever

Question 5

Which of the following transports water from the roots of the plant to its leaves?

Accepted Answer

Both xylem and phloem

Question 6

Kyoto Protocol is associated with

Accepted Answer

Climate change

Question 7

Which one of the following elements is involved in the control of water content of the blood?

Accepted Answer

Aldosterone is a key steroid hormone critical for maintaining salt and water balance. It regulates the concentration of minerals, like sodium and potassium, in the fluid outside your cells. When your sodium levels drop, or potassium levels rise, your body signals your adrenal glands to release aldosterone into your blood. Aldosterone signals your kidneys to reabsorb sodium into the blood, and acts on your sweat glands to reduce sodium loss through sweat.

Question 8

Meibomian glands are located in

Accepted Answer

Eye

Question 9

Statement I : A person may suffer from tuberculosis if she/he frequently visits crowded place. Statement II : Bacteria of tuberculosis spread through droplets by sneezing or coughing.

Accepted Answer

Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis. It's spread when a person with active TB disease in their lungs coughs or sneezes and someone else inhales the expelled droplets, which contain TB bacteria. One would have to spend prolonged periods (several hours) in close contact with an infected person to catch the infection yourself.For example, TB infections usually spread between family members who live in the same house. It would be highly unlikely for you to become infected by sitting next to an infected person on a bus or train. Hence, statement 1 is incorrect.

Question 10

Statement I : Bioaccumulation is a process of progressive accumulation of heavy metals and pesticides in an organism. Statement II : Large fishes of the pond are found to have higher concentration of pesticides than planktons of the same pond.

Accepted Answer

Bioaccumulation is defined as the increase in concentration of a substance(s) in an organism or a part of that organism. The affected organism has a higher concentration of the substance than the concentration in the organism's surrounding environment. For the second statement: Microorganisms eat pesticide infected things. Invertebrates eat hundreds of the microorganisms and plants infected with the pesticides, accumulating a pretty large amount of the toxin in them. The invertebrates are generally then eaten by larger invertebrates or amphibians, which ingest hundreds of similar organisms, accumulating an even higher concentration of toxins in their bodies. Then the fish eat hundreds of these organisms, accumulating the highest concentration of toxins in themselves.

Question 11

In which one of the following types of connective tissues in animals does fat get stored?

Accepted Answer

Adipocytes are the major source of leptin production, and plasma leptin concentrations directly correlate with the amount of total body fat. Adipocytes are highly specialized cells that play a crucial role in the energy balance of most vertebrates. Adipocytes convert excess energy to tri-acylglycerol and deposit it during feeding in preparation for periods of food deprivation. Adipocytes may become enlarged by increased fat storage

Question 12

Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?

Accepted Answer

Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor. The paramecium uses its cilia to sweep the food along with some water into the cell mouth after it falls into the oral groove. The underside of the starfish is covered with hundreds of tube feet, which it uses for walking around, for attaching tightly to rocks, and for holding on to prey. Nereis possess setae and parapodia for locomotion

Question 13

Which of the following carries oxygen to various parts of human body?

Accepted Answer

Red blood cells

Question 14

Which of the following function is performed by the kidneys in the human body?

Accepted Answer

Excretion

Question 15

Which one of the following statements about lymph is correct?

Accepted Answer

The lymphatic system is a complex system of fluid drainage and transport, and immune response and disease resistance. Fluid that is forced out of the bloodstream during normal circulation is filtered through lymph nodes to remove bacteria, abnormal cells and other matter. This fluid is then transported back into the bloodstream via the lymph vessels. Lymph only moves in one direction, toward the heart.

Question 16

Which of the following classes of animals has/have three-chambered heart?

Accepted Answer

Mammalian and avian hearts have four chambers two atria and two ventricles.Amphibians and reptiles, by contrast, have a three-chambered heart. The three-chambered heart consists of two atria and one ventricle.Fish possess the simplest type of true heart a two-chambered organ composed of one atrium and one ventricle.

Question 17

Sphygmomanometer measures the blood pressure in the

Accepted Answer

Arteries

Question 18

Accumulation of which one of the following in the leads to cramp?

Accepted Answer

Muscle cramping is a common problem encountered by athletes and non athletes alike. Defined as painful involuntary skeletal muscle contractions, cramps may be categorized as either non exercise related or exercise related. Traditionally, such cramping was believed to arise from dehydration, electrolyte imbalances (including magnesium, potassium and sodium),accumulation of lactic acid, or low cellular energy levels.

Question 19

The sigmoid colon is a part of

Accepted Answer

Large Intestine

Question 20

The connective tissue that connects a muscle to a bone is

Accepted Answer

Tendon

Biology Questions