Organisation of Life
1.Which of the following is an example of a unicellular organism?
A. Human
B. Yeast
C. Tree
D. Dog
Correct Answer: B. Yeast
2.Which of the following is an example of a unicellular organism?
A. Human
B. amoeba
C. Tree
D. Dog
Correct Answer: B. amoeba
3.What type of organism is amoeba?
A. Multicellular organism
B. Prokaryote
C. Unicellular eukaryote
D. Multicellular prokaryote
Correct Answer: C. Unicellular eukaryote
4.Cells consist of cytoplasm enclosed within a:
A. Cell wall
B. Membrane
C. Nucleus
D. Ribosome
Answer: B. Membrane
5.The unit commonly used to measure cell size is:
A. Millimeter
B. Centimeter
C. Micron
D. Nanometer
Correct Answer: C. Micron
6.Approximately what is the average size range of a typical animal cell in diameter?
A. 0.1-1 µm
B. 1-20 µm
C. 20-100 µm
D. 100-1000 µm
Correct Answer: B. 1-20 µm
7.How large is a typical human egg (ovum) in diameter?
A. 1 µm
B. 10 µm
C. 100 µm
D. 1000 µm
Correct Answer: C. 100 µm
8.In the human body, the smallest cell is:
A. Nerve cell
B. Skin cell
C. Red blood cell
D. Muscle cell
Correct Answer: C. Red blood cell
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9.The longest cell in the human body is the:
A. Muscle cell
B. Red blood cell
C. Nerve cell
D. White blood cell
Correct Answer: C. Nerve cell
10.Which organism has the largest cell among multicellular animals?
A. Human
B. Elephant
C. Whale
D. Ostrich
Correct Answer: D. Ostrich
11.The smallest bacterial cell in diameter is:
A. 0.0001 mm
B. 0.1 mm
C. 1 mm
D. 10 mm
Correct Answer: A. 0.0001 mm
12.One micron (µm) is equal to:
A. 1/1000 meter
B. 1/10000 meter
C. 1/100000 meter
D. 1/1000000 meter
Correct Answer: D. 1/1000000 meter
13.What is the average size range of a typical animal cell in diameter?
A. 0.1-0.5 µm
B. 0.5-20 µm
C. 20-50 µm
D. 50-100 µm
Correct Answer: B. 0.5-20 µm
14.What is the approximate size of bacterial cells?
A. 0.1-0.5 µm
B. 1-2 µm
C. 7 µm
D. 100 µm
Correct Answer: B. 1-2 µm
15.The diameter of a human red blood cell is approximately:
A. 1-2 µm
B. 7 µm
C. 100 µm
D. 90-100 cm
Correct Answer: B. 7 µm
16.What is the approximate length of a human nerve cell?
A. 7 µm
B. 100 µm
C. 90-100 cm
D. 1-2 µm
Correct Answer: C. 90-100 cm
17.What is the name of the single cell from which our body develops?
A. Embryo
B. Zygote
C. Gamete
D. Foetus
Correct Answer: B. Zygote
18.How many types of tissues make up most organs in the body?
A. Two
B. Three
C. Four
D. Five
Correct Answer: C. Four
19.The inner lining of the intestine is primarily made up of:
A. Muscle tissue
B. Connective tissue
C. Nervous tissue
D. Epithelial tissue
Correct Answer: D. Epithelial tissue
20.How many colors can the human eye differentiate approximately?
A. 1–2 million
B. 5–6 million
C. 10–12 million
D. 20 million
Correct Answer: C. 10–12 million
21.What is the primary function of the larynx?
A. To filter air
B. To produce sound
C. To regulate temperature
D. To exchange gases
Correct Answer: B. To produce sound
22.What is the trachea commonly known as?
A. Windpipe
B. Voice box
C. Nasal cavity
D. Pharynx
Correct Answer: A. Windpipe
23.Which structure is located between the pharynx and the trachea?
A. Bronchi
B. Larynx
C. Alveoli
D. Diaphragm
Correct Answer: B. Larynx
24.The larynx is commonly known as the:
A. Windpipe
B. Voice box
C. Air sac
D. Nose
Correct Answer: B. Voice box
25.The average breathing rate of an adult at rest is:
A. 10-12 times per minute
B. 15-18 times per minute
C. 20-25 times per minute
D. 30-35 times per minute
Correct Answer: B. 15-18 times per minute
26.During heavy exercise, breathing rate can increase up to:
A. 15 times per minute
B. 20 times per minute
C. 25 times per minute
D. 30 times per minute
Correct Answer: C. 25 times per minute
27.How does oxygen move from the alveoli into the blood?
A. By active transport
B. By osmosis
C. By simple diffusion
D. By facilitated diffusion
Correct Answer: C. By simple diffusion
28.When hemoglobin binds with oxygen, it forms:
A. Deoxyhemoglobin
B. Oxyhemoglobin
C. Carboxyhemoglobin
D. Methemoglobin
Correct Answer: B. Oxyhemoglobin
29.Which hormone is secreted when blood glucose levels are elevated?
A. Glucagon
B. Cortisol
C. Insulin
D. Adrenaline
Correct Answer: C. Insulin
30.The hormone responsible for raising blood glucose levels is:
A. Glucagon
B. Insulin
C. Cortisol
D. Epinephrine
Correct Answer: A. Glucagon
31.The secretion of insulin helps to:
A. Increase blood glucose levels
B. Convert glucose to glycogen
C. Convert glycogen to glucose
D. Decrease blood glucose levels
Correct Answer: B. Convert glucose to glycogen
32.Who coined the term "osmoregulation"?
A. Darwin
B. Hober
C. Lamarck
D. Wallace
Correct Answer: B. Hober
33.Osmoregulation is the process of maintaining:
A. Blood pressure
B. Body temperature
C. Blood sugar levels
D. Water balance
Correct Answer: D. Water balance
34.What form of energy is produced during cellular respiration?
A. DNA
B. RNA
C. ATP
D. NADH
Correct Answer: C. ATP
35.Which type of respiration requires oxygen?
A. Anaerobic respiration
B. Fermentation
C. Aerobic respiration
D. Glycolysis
Correct Answer: C. Aerobic respiration
36. How much more energy does aerobic respiration release compared to anaerobic respiration from the same glucose?
A. 5 times
B. 10 times
C. 19 times
D. 25 times
Correct Answer: C. 19 times
37. How many ATP molecules are produced from one glucose molecule during aerobic respiration?
A. 12 ATPs
B. 24 ATPs
C. 36 ATPs
D. 48 ATPs
Correct Answer: C. 36 ATPs
38.How long after the intake of food is basal metabolism typically measured?
A. 1–2 hours
B. 4–6 hours
C. 8–10 hours
D. 12–18 hours
Correct Answer: D. 12–18 hours
39.What is the primary product of carbohydrates when they are broken down?
A. Amino acids
B. Glucose
C. Fatty acids
D. Nucleotides
Correct Answer: B. Glucose
40. What are the end products of glucose metabolism?
A. Amino acids and heat
B. CO2, water, and heat
C. Lactic acid and ATP
D. Urea and water
Correct Answer: B. CO2, water, and heat
41. Proteins are broken down into which of the following components?
A. Glucose
B. Fatty acids
C. Amino acids
D. CO2
Correct Answer: C. Amino acids
42. What is glucose converted into in the body?
A. Amino acids
B. Cholesterol and steroids
C. Glycogen and other sugars
D. Enzymes and hormones
Correct Answer: C. Glycogen and other sugars
43. What are amino acids used to produce in the body?
A. Glycogen
B. Cholesterol and steroids
C. Enzymes, hormones, and proteins
D. Glucose
Correct Answer: C. Enzymes, hormones, and proteins
44.Fatty acids are primarily used to produce:
A. Glycogen
B. Enzymes
C. Cholesterol and other steroids
D. Amino acids
Correct Answer: C. Cholesterol and other steroids
45……………… is tough and thick white sheath that protect the inner parts of the eye.
(a) Sclera
(b) Conjunctiva
(c) Cornea
(d) Iris
Answer:
(a) Sclera
46.Maintenance of constant internal environment of the body is known as ………………
(a) Homeostasis
(b) Homeophytes
(c) Homeokinesis
(d) Homeophilics
Answer:
(a) Homeostasis
47.In the absence of oxygen, glucose is broken down into ………………
(a) Lactic acid
(b) Citric acid
(c) Acetic acid
(d) Nitric acid
Answer:
(a) Lactic acid
48.……………… cells are specialised cells that can be transformed into any kind of cells.
(a) Nerve
(b) Stem
(c) Heart
(d) Bone
Answer:
(b) Stem
49.The process of air passing in and out the lungs is called ………………
(a) Inhalation
(b) Exhalation
(c) Breathing
(d) None of these
Answer:
(c) Breathing
50.Osmosis is the movement of water molecules from a ………………
(a) Higher concentration to a region of lower concentration.
(b) Lower concentration to a region of higher concentration.
(c) Both of these
(d) None of these
Answer:
(a) Higher concentration to a region of lower concentration
51.The erythrocyte is placed in ……………… solution which has lesser concentration of solutes and greater concentration of water than in the cytoplasm.
(a) Hypotonic
(b) Hypertonic
(c) Neutral
(d) Acidic
Answer:
(a) Hypotonic
52.What is the structural and functional unit of living organisms?
A. Tissue
B. Organ
C. Cell
D. Organism
Correct Answer: C. Cell
53.What is the largest cell, which is an example of an egg, known as?
A. Chicken
B. Ostrich
C. Dolphin
D. Whale
Correct Answer: B. Ostrich
54.Which process is a good example of anaerobic respiration?
A. Cellular respiration
B. Photosynthesis
C. Fermentation
D. Glycolysis
Correct Answer: C. Fermentation
55.Which nerve is located at the end of the eyes behind the retina?
A. Optic nerve
B. Trigeminal nerve
C. Auditory nerve
D. Olfactory nerve
Correct Answer: A. Optic nerve
56.The size of cells is measured in units of:
A. Millimeters
B. Nanometers
C. Microns
D. Centimeters
Correct Answer: C. Microns
57.What is the colored portion of the eye called?
A. Retina
B. Cornea
C. Iris
D. Lens
Correct Answer: C. Iris
58.What is the transparent membrane that keeps the eye moist called?
A. Retina
B. Conjunctiva
C. Cornea
D. Sclera
Correct Answer: B. Conjunctiva
59.What is the membrane that covers the lungs called?
A. Pericardium
B. Meninges
C. Pleura
D. Synovium
Correct Answer: C. Pleura
60.What is the voice box called?
A. Trachea
B. Larynx
C. Pharynx
D. Esophagus
Correct Answer: B. Larynx
61.………………. is a type of connective tissue.
(a) Bone
(b) Cardiac muscle
(c) Neuron
(d) Ciliated epithelium
Answer:
(a) Bone
62.………………. is a transparent layer.
(a) Sclera
(b) Cornea
(c) Choroid
(d) Retina
Answer:
(b) Cornea
63.is not an example of diffusion.
(a) Tea bags in hot water
(b) Incense sticks
(c) Exchange of respiratory gases
(d) Pickling
Answer:
(d) Pickling
64.Each glucose molecule produces ATP.
(a) 38
(b) 40
(c) 36
(d) 34
Answer:
(c) 36
65…………….. of the eye is comparable to film of a camera.
(a) Retina
(b) Sclera
(c) Lens
(d) Cornea
Answer:
(a) Retina
