Time limit: 0
0 of 50 questions completed
- Science and Tech-Biology Important Questions
- Free Online Test with Answers
- Very useful for all Competitive Exams
You have already completed the quiz before. Hence you can not start it again.
Test is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
0 of 50 questions answered correctly
Time has elapsed
You have reached 0 of 0 points, (0)
- Not categorized 0%
- Question 1 of 50
Which one of the following is a female sex hormone?
Estrogen is a female hormone that plays various roles. It helps develop and maintain both the reproductive system and female characteristics, such as breasts and pubic hair.
- Question 2 of 50
Which one of the following chemicals is a neurotransmitter substance?
Adrenaline is a neurotransmitter in the sense that, within the brain, it helps neurons to communicate with one another.
- Question 3 of 50
Which of the following is the function of “Iodised Salt” in the human body?
Thyroid gland uses iodine to make thyroid hormones, which help control growth, repair damaged cells and support a healthy metabolism.
- Question 4 of 50
Which of the following vegetable oils does not contain essential fatty acids?
Essential fatty acids (EFAs) are fatty acids that humans and other animals must ingest because the body requires them for good health but cannot synthesize them.
- Question 5 of 50
Pregnant women usually become deficient in:
During Pregnancy, body needs iron to make hemoglobin — that’s the substance in red blood cells that helps carry oxygen to your organs and tissues.
- Question 6 of 50
Which components of light are absorbed by chlorophyll?
Chlorophyll is an extremely important biomolecule, critical in photosynthesis, which allows plants to absorb energy from light. Chlorophyll absorbs light most strongly in the blue portion of the electromagnetic spectrum, followed by the red portion.
- Question 7 of 50
Ginger is a stem and not a root because:
The rhizomes of ginger are considered as stems and not as roots as it contains nodes and internodes.
- Question 8 of 50
Eyes of potato are useful for:
The ‘eye’ of the potato can produce new plants by vegetative propagation.
- Question 9 of 50
Taenia solium (Tapeworm) lives as a parasite in:
Pigs are intermediate hosts of the Taenia solium. Taenia solium infection (taeniasis) is an intestinal infection with adult tapeworms that follows ingestion of contaminated pork.
- Question 10 of 50
An ant can see the objects all around it due to the presence of:
The visual system of an ant is comprised of a pair of compound eyes and a set of simple eyes called ocelli.
- Question 11 of 50
What is the approximate time required for a heartbeat?
A normal resting heart rate for adults ranges from 60 to 100 (Children- 70 to 100) beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness.
Approximate time required for a heartbeat
= 60 second ÷ average heart rate ≈ 0.8 second.
- Question 12 of 50
Which from the following is not a gland?
A gland is an organ that makes one or more substances, such as hormones, digestive juices, sweat, tears, saliva, or milk.
- Question 13 of 50
Which one of the following is an abnormal constituent of urine?
Ketone bodies are chemicals that the body makes when there is not enough insulin in the blood and it must break down fat instead of the sugar glucose for energy. Testing for ketones in urine is important in people with diabetes.
- Question 14 of 50
Which one of the following cells produces antibodies?
A lymphocyte is a type of white blood cell that is part of the immune system.
- Question 15 of 50
The Vitamin which helps in clotting of blood is:
Vitamin K helps to make various proteins that are needed for blood clotting and the building of bones.
- Question 16 of 50
At very high altitude, the Red Blood Corpuscles in the human body will:
Number of red blood cells per unit volume of blood is likely to be higher in a person living at high altitudes. This is in response to the air being less dense at high altitude and number of red blood cells is needed to trap O2 from rarefied air having low pO2 (partial pressure of oxygen).
- Question 17 of 50
A test-tube baby means:
It involves fertilizing an egg outside the body, in a laboratory dish (vitro), and then implanting it in a woman’s uterus.
- Question 18 of 50
A substance that stimulates the production of antibodies when introduced into a living organism is known as:
Antigen is a substance that enters the body and starts a process that can cause disease. The body then usually produces substances (antibodies) to fight the antigens.
- Question 19 of 50
‘Darwin finches’ refer to a group of:
Darwin’s finches are a group of about 18 species of passerine birds.
- Question 20 of 50
The tissue in man where no cell division occurs after birth is:
While there are a few cells in the body that do not undergo cell division (such as gametes, red blood cells, most neurons, and some muscle cells), most somatic cells divide regularly.
- Question 21 of 50
The source of oxygen generated during photosynthesis is:
- Question 22 of 50
Which one of the following elements is associated with teeth disorder?
Fluoride deficiency can lead to tooth decay and possibly osteoporosis. Consuming enough fluoride can make tooth decay less likely and may strengthen bones.
- Question 23 of 50
Hay fever is a sign of:
Hay fever, also called seasonal allergies, causes cold-like signs and symptoms, such as a runny nose, itchy eyes, congestion, sneezing and sinus pressure. But unlike a cold, hay fever isn’t caused by a virus.
- Question 24 of 50
Edward Jenner is associated with:
Edward Jenner (1749 – 1823) was an English surgeon, who discovered a vaccination for smallpox. It is in fact, the world’s first vaccine.
- Question 25 of 50
A plant with compound leaves is:
Compound leaf consisting of several or many distinct parts (leaflets) joined to a single stem. Shame plant, Rose, Clover, Baobab, Neem, Buckeye, Desert cotton, Horse chestnut, Poison ivy, etc. are some examples of a compound leaf. Guava, peepal, hibiscus, oregano, pear plant, etc are simple leaves.
- Question 26 of 50
The scientist who explained about blood circulation for the first time was:
William Harvey made the momentous medical discovery that the flow of blood must be continuous and that its flow must be in one direction only.
- Question 27 of 50
Which one of the following is not a digestive enzyme?
Digestive enzymes are a group of enzymes that break down polymeric macromolecules into their smaller building blocks, in order to facilitate their absorption by the body.
Insulin is a hormone made in your pancreas, a gland located behind your stomach. It allows your body to use glucose for energy.
- Question 28 of 50
The ‘Theory of Evolution’ was put forward by:
Charles Robert Darwin was an English naturalist, geologist and biologist, best known for his contributions to the Theory of Evolution.
- Question 29 of 50
In a human body, the longest bone is in the:
The femur is the longest bone found in the human body. It is almost 19.9 inches long and is commonly known as the thigh bone.
- Question 30 of 50
The metal present in insulin is:
The chemical formula of insulin is C257H383N65O77S6Zn. Thus, insulin contains the element of zinc.
- Question 31 of 50
Which of the following is an ozone-depleting pesticide?
Methyl bromide damages the ozone layer once released into the atmosphere. It is also toxic and harmful to humans and fauna if not used carefully.
- Question 32 of 50
Roundworm is a human parasite found in the:
A roundworm called Ascaris lumbricoides infects a person’s small intestine and acts as a parasite, getting nutrients from its host’s intestinal tract.
- Question 33 of 50
Who introduced the use of artificial heart for surgery?
Christiaan Neethling Barnard was a South African cardiac surgeon who performed the world’s first human-to-human heart transplant operation.
- Question 34 of 50
Which of the following is a rich source of Vitamin B₁₂?
Vitamin B₁₂, also known as cobalamin, is an essential vitamin necessary for healthy nerve tissue, brain function, and red blood cell production. Good sources of vitamin B₁₂ are meat, fish, milk, cheese, eggs, etc.
- Question 35 of 50
Clove, the commonly used spice, is obtained from the:
- Question 36 of 50
Milk is not considered a balanced diet now-a-days because of the absence of:
Milk has some good qualities (protein, calcium, vitamin D, etc.) However, milk is a poor source of iron and vitamin C.
- Question 37 of 50
Seasickness is due to the effect of the motion of ship, on:
Seasickness is a result of a conflict in the inner ear, where the human balance mechanism resides, and is caused by a vessel’s erratic motion on the water.
- Question 38 of 50
The main function of white blood cells in the body is to:
- Question 39 of 50
The gas used for artificial fruit ripening of green fruit is:
Many fruit wholesalers make fruits ripen using artificial ripening agents’ such as calcium carbide, ethylene, ethephon and smoke.
- Question 40 of 50
‘ELISA test’ is employed to diagnose:
An enzyme-linked immunosorbent assay, also called ELISA or EIA, is a test that detects and measures antibodies in your blood.
- Question 41 of 50
EEG is used to detect the functioning of:
An electroencephalogram (EEG) is a test that detects electrical activity in your brain using small, metal discs (electrodes) attached to your scalp.
- Question 42 of 50
Locked jaw disorder is the other name of the disease:
Locked jaw disorder (Tetanus) is a serious bacterial infection. It affects the muscles and the nervous system throughout the body. This infection often affects the muscles of the neck and jaw, but eventually spreads to the rest of the body.
- Question 43 of 50
Excretory products of mammalian embryo are eliminated out by:
The placenta is a temporary organ that develops in the uterus during pregnancy. It provides the nutrients and oxygen to the baby for development and growth. Waste products excreted from the fetus such as urea, uric acid, and creatinine are transferred to the maternal blood by diffusion across the placenta.
- Question 44 of 50
In male sharks, Claspers are found attached to:
Male sharks have two claspers because sharks have two pelvic fins. The claspers are simply a modified portion of the pelvic fin, and since there are two pelvic fins, there are two claspers.
- Question 45 of 50
What part of the eye gets inflamed and becomes pink when dust gets into?
The conjunctiva is the clear, thin membrane that covers part of the front surface of the eye and the inner surface of the eyelids. Conjunctivitis is often called pink eye. It happens when the conjunctiva is irritated by an infection or allergies.
- Question 46 of 50
What is the number of chromosomes in a normal human body cell?
- Question 47 of 50
Xerophthalmia is a deficiency disease caused by lack of:
Xerophthalmia is a progressive eye disease caused by vitamin A deficiency. Lack of vitamin A can dry out your tear ducts and eyes.
- Question 48 of 50
Out of the following glands which is referred to as the master gland?
The pituitary gland is sometimes called the ‘master gland’ of the endocrine system because it controls the functions of many of the other endocrine glands. The pituitary gland is no larger than a pea, and is located at the base of the brain.
- Question 49 of 50
What is an antibiotic?
An antibiotic is a type of antimicrobial substance active against bacteria.
- Question 50 of 50
Carbohydrate is stored in the body as:
The body breaks down most carbohydrates from the foods we eat and converts them to a type of sugar called glucose. Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals, fungi, and bacteria.