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Questions on Basic-Science


Academic Articles Academic Questions and Answers Key Points in Academics Interesting Facts for Students Quotes for Students

Academic Quotes

The first problem for all of us, men and women, is not to learn, but to unlearn - Gloria Steinem

The act of unlearning is an excellent form of learning. Infact, you will need the skills of unlearning if you intend to become an expert in your desired field.

Do yourself a favor by unlearning, learning and re-learning on a daily basis

If you don't design your own life plan, chances are you'll fall into someone else's plan. And guess what they have planned for you? Not much - Jim Rohn

There's something special about you. It doesn't matter whether you work for a company or someone; what matters is the amount of investment you've made on yourself.

Investing in yourself is the best life plan you can design for your future

Smile - Len Academy

Peace begins with a smile - Mother Teresa

Never underestimate the power of your smile. It can lift up the depressed, improve the mood of the downtrodden and even discourage a suicidal attack. Also remember that your smile makes you more beautiful

Smile always for your own good and the good of others

The only person who is educated is the one who has learned how to learn …and change - Carl Rogers

To perfect your learning process, you must learn, unlearn and re-learn. Infact, we all need to learn how to unlearn those vices we know about ourselves.

Do you know that seeing the devastating consequences of vices (perhaps in movies or real-life) can initiate the unlearning processes in one who does such?

Start where you are. Use what you have. Do what you can - Arthur Ashe

Start now. You've got all it takes to achieve greatness, so no environment can limit you. Just begin something, give in your best and don't stop.

Remember, don't stop giving your best if you truly desire greatness. Nothing can stop you except yourself


Vaccination involves a process of introducing pathogens or germs into a person in order to prevent such person from the diseases they cause.

  • A. True

  • B. False

ANSWER: True

Another name for vaccination is 'immunization'. It is defined as process of introducing disease causing organisms (called pathogens or germs) into a person in order to prevent such person from the diseases they cause.

Vaccination can be given via injections, orally or nasally.

Please read on the concept of immunization or vaccination here

With regards to the human health, foreign bodies are best regarded as _____.

  • A. International bodies

  • B. Antilators

  • C. Antibodies

  • D. Antigens

  • E. Antibiotics

  • F. Antidotes

ANSWER: Antigens

The term 'foreign bodies' may also be regarded as pathogens, germs or antigens because they cause diseases. Infact, we are immunized or vaccinated against the diseases caused by various foreign bodies.

Please read on the importance of immunization here

Disease causing organisms are termed _____.

  • A. Pests

  • B. Pathogens

  • C. Vectors

  • D. Insects

  • E. Disease carriers

  • F. All the above options are correct

ANSWER: Pathogens

Any organism that causes disease is termed a pathogen or germ. An example of a pathogen is plasmodium; and it causes malaria.

In the above instance, understand that mosquitoes doesn't cause malaria, rather it carries the pathogen (plasmodium) that causes malaria. However, mosquitoes introduces the malaria parasite 'plasmodium' into the host's blood.

In the above paragraph, mosquitoes are regarded as vectors because they convey organisms that cause diseases (pathogen or germs).

Think of a pest as any organism that causes damage to crop plant. They could be insects or animals. Examples of pest include aphids, cotton strainers, monkeys, rodents, etc.

Please read on the pest of agricultural importance here

____ is formed from a reaction utilizing oxygen and glucose in the mitochondria of cells.

  • A. Galactose

  • B. Fructose

  • C. Sucrose

  • D. AMP

  • E. ADP

  • F. ATP

ANSWER: ATP

ATP is an acronym for 'AdenosineTriPhosphate'. It is the energy currency in the body. In short, it is the very molecule we need to perform any form of energy consuming activity in the body.

Understand that ATP is a product of aerobic respiration which requires oxygen and glucose, and ultimately take place in the mitochondria of cells.

Please read more on the basic characteristics of living organisms here

Which of the following statement is false concerning carbohydrates?

  • A. They are composed of carbon, hydrogen and oxygen only

  • B. Carbon has the highest ratio of the constituent elements of carbohydrates

  • C. All carbohydrates are sugars

  • D. Fructose is a carbohydrate

  • E. Natural milk contains lactose and it's a carbohydrate

  • F. Fatty foods contains high calories of energy when compared to the same quantity of carbohydrate foods

ANSWER: Carbon has the highest ratio of the constituent elements of carbohydrates

Hydrogen has the highest ratio of the constituent elements of carbohydrates.

Understand that carbohydrates are composed of three elements. They are: carbon, hydrogen and oxygen (CHO); in the ratio of 1:2:1. As an instance, glucose is a carbohydrate and its formula is C6H12O6.

Which of the following is a class of food?

  • A. Water

  • B. Fibre

  • C. Roughages

  • D. Latex

  • E. Tanins

  • F. Wax

ANSWER: Water

Food is defined as anything which provides nutrients when ingested by living organisms in order to stay alive.

We have six classes of food. They are:

  1. Carbohydrates

  2. Proteins

  3. Fats and Oils

  4. Vitamins

  5. Mineral salts 

  6. Water

Please read more on food, carbohydrates and sugars here

Brachiation is a specialized form of movement exhibited by _____.

  • A. Human beings

  • B. Babbons

  • C. Chameleons

  • D. Toads

  • E. Millipedes

  • F. Birds

ANSWER: Babbons

Brachiation is a specialized form of movement whereby animals swing from one tree branch (or projection) to another. It may also be referred to as arm swinging.

The choice of movement in babbons is brachiation.

_____ is a form of locomotion whereby an organism move by means of its two hind limbs.

  • A. Pedalism

  • B. Duo Pedalism

  • C. Double Pedalism

  • D. Dual Pedalism

  • E. Bipedalism

  • F. Copedalism

ANSWER: Bipedalism

Bipedalism is a form of locomotion whereby an organism move by means of its two hind limbs.

Interestingly, humans are unique in the sense that they are the only animals that can efficiently move in an upright manner with both feet.

Please read more on the uniqueness of man here

The human brain is folded into gyri, grooved into sulci and also the most developed among all organisms in the universe.

  • A. True

  • B. False

ANSWER: True

Among all organisms in the universe, the human brain is the most developed. This is infact the biggest factor that makes human being unique from every other organism on earth.

Below is an image of the human brain:

Human brain - Len Academy

According to science, all human beings are animals.

  • A. True

  • B. False

ANSWER: True

Basic science and biology teaches us that human beings belong to the kingdom animalia. This makes them animals (since all organisms belonging to the kingdom animalia are termed animals).

However, it is important to state that human beings are higher animals.

Please read on the uniqueness of man here

Biomedic wastes are also referred to as _____ wastes.

  • A. Hospital

  • B. Recyclable

  • C. Metabolic

  • D. Green

  • E. Radioactive

  • F. Electronic

ANSWER: Hospital

Another name for biomedic waste is hospital waste. They are wastes that contain (or will eventually contain) an infectious substance. They also include laboratory and hospital generated wastes from various tests and treatments.

Example of hospital (or biomedic) waste include blood, syringes, infusion kits and so on.

Sweat and urine are best considered as _____ waste.

  • A. Non-Biodegradable

  • B. Refuse

  • C. Recyclable

  • D. Metabolic

  • E. Green

  • F. Radioactive

ANSWER: Metabolic

Metabolic wastes are generated from the various metabolic (breaking down and building up) activities in living organisms. Examples include sweat, urine, carbon(IV)oxide and oxygen (in plants).

You can read more on types of waste here

_____ is defined as the process of collecting, processing, recycling and controlling any material considered as waste.

  • A. Waste collecting and processing

  • B. Waste processing and collecting

  • C. Waste recycling and control

  • D. Waste control and recycling

  • E. Waste treatment

  • F. Waste Management

ANSWER: Waste Management

The above definition relates to waste management. Wastes must be properly manage because:

  • They may block drainages thus resulting into flooding during rainy season

  • They generate bad smells which can be dangerous to health

  • They become home to various disease causing organisms

  • They constitute nuisance and eyesore

Please read more on waste management here

Which of the following statement is FALSE concerning mass and weight?

  • A. Mass is the amount of matter in a body

  • B. The element hydrogen has the smallest mass

  • C. You will weigh more on planet jupiter than earth

  • D. Weight is a function of gravity

  • E. Mass and Weight have different Standard International (S.I) Units

  • F. None of the above

Answer: None of the above

All the above options are true concerning mass and weight.

Please read more on Mass versus Weight here

Which of the following statement is false concerning matter?

  • A. Anything considered as matter must either have mass or occupy space

  • B. Air is an example of matter

  • C. Plasma is a state of matter

  • D. Chemistry is considered as the study of matter and the changes they undergo

  • E. Vacuum is a space completely void of matter

  • F. Matter will always take up space no matter how small or invincible it is to the eyes

Answer: Anything considered as matter must either have mass or occupy space

For a thing to be considered as matter, it must have both properties of having mass and occupying space (not either of them). In short, matter is defined as anything that has mass and occupy space.

Please read more on the Concept of Matter here

Which of the following is not matter?

  • A. Atom

  • B. Molecule

  • C. Ion

  • D. Bacterium

  • E. Virus

  • F. None of the above

Answer: None of the above

Matter is anything that has mass and occupy space. It can be visible or invinsible to the human eyes. For instance, you are matter yourself. The bacteria around us are also classified as matter although they aren't visible to the eyes.

All matter is made up of particules. Such particles include atoms, molecules, ions, protons, neutrons, electrons quarks and so on.

It's is important to state that these particles that make up matter are so tiny that they aren't visible to the naked eyes. You may only see them through a microscope. However, when these particles unite in billions or trillions, they become visible to the human eyes. For instance, humans are made up of trillions of cells and are hence visible to the eyes, unlike a bacterium which is typically unicellular and thus can't be seen by the human eyes, but the aid of a microscope

The ultimate source of energy is _____.

  1. Plant
  2. Sun
  3. Food
  4. Water
  5. Air
  6. Earth

ANSWER: Sun

Without the sun, there will be no life on earth. Plants require the sun to manufacture their food. The mode of nutrition through which organisms manufacture their own food is termed autotrophic nutrition.

Please read on autotrophic nutrition here.

Note: Every other form of energy directly or indirectly comes from the sun.

The speed of wind is measured with a wind vane.

TRUE or FALSE

ANSWER: False

The speed of wind is measured with an anemometer while the direction of wind is measured with a wind vane

The nutrient majorly found in the liver is _____.

  • A. Carbohydrate
  • B. Starch
  • C. Protein
  • D. Fats
  • E. Oil
  • F. Lipids

ANSWER: Protein

A nutrient is any substance that contains the nourishment essential for life.

Nutrients are present in all the six classes of food. The classes of food are:

  1. Carbohydrate
  2. Protein
  3. Fats and Oil
  4. Vitamins
  5. Mineral Salts
  6. Water

Note: The liver is a very rich source of protein. Other sources of protein are fish, egg and meat.

You can read on the Sources, Functions and Deficiencies of Mineral Salts here

A body at rest possess _____ energy.

  • A. Kinetic
  • B. Potential
  • C. Mechanical
  • D. Chemical

ANSWER: Potential Energy

Potential energy is the energy stored within an object with regards to its position or location. For instance, when a car is parked, the energy stored within the parked car is a potential energy. If the car begins to move, the energy within the car will no longer be potential since it's in motion.

Energy in motion is termed Kinetic energy.

Note: Energy is the ability to do work. The parked car in our above example have the ability to do work, but at that moment, it's energy was potential since it's parked (in a static position) with all it's energy present within it.

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