Biology Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

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Biology Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

Biology Mcqs - (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests
Biology Mcqs

Biology Mcqs “. Tab this page to check “Latest Biology MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of Biology in past papers. Past papers of Biology mcqs. Past papers of Biology MCQs. Biology Mcqs are the necessary part of any competitive / job related exams. The Biology mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Biology mcqs. The Important series of Biology Mcqs are given below:

The blood enters the ________________ side of heart ?

A. Posterior
B. Lateral
C. Anterior
D. All possible

Voice box is another name used for___________?

A. Pharynx
B. Buccal cavity
C. Larynx
D. Chest Cavity

All of the following contain cartilage except:___________?

A. Trachea
B. Larynx
C. Bronchi
D. Bronchioles

Gaseous exchange through the skin is known as ______________ respiration?

A. Skin
B. Cutaneous
C. Cuticular
D. Pulmonary

Respiratory distress syndrome is common especially for infants with a__________?

A. Less than 7 month
B. Less than 9 month
C. Less than 8 month
D. More than 9 month

Parabronchi are open at ______________ end/s?

A. Do not have opening
B. Both
C. Single
D. None of these

In most birds air sacs are ____________ in number?

A. 3
B. 10
C. 4
D. 9

Vocal cords are stretched across_______?

A. Pharynx
B. Larynx
C. Golttis
D. None of these

A joint formed between humerus, radius and ulna is an example of__________?

A. Slightly movable joint.
B. Immovable joint.
C. Freely movable joint.
D. Fibrous joint

Which of the following plays the major role in providing support to young herbaceous parts of the plant?

A. Collenchyma cells
B. Living cells of cortex and pith with higher turgor pressure.
C. Living cells of epidermis with higher turgor pressure.
D. All of these

Joint between two parietal bones, which is infact immovable one is an example of_________?

A. Fibrous joints.
B. Synovial joints.
C. Cartilaginous joints.
D. None of these

Fibrous capsule surrounding synovial joints may be thickened at some places to form:

A. Muscles.
B. Ligaments.
C. Synovial membrane.
D. Tendon

Higher turgor pressure in a plant cell is maintained by________________?

A. Higher osmotic pressure of the cell vacuole
B. Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane
C. Large number of vacoules in a plant cell.
D. both b and c

In which of the following joint muscles are arranged in the same plane as that of joint?

A. Between ulna and scapula
B. Between radius and ulna.
C. Between humerus and scapula
D. Between femur and tibia.

Which of the following hormone is predominantly responsible for bone weakening in older women?

A. Calcitonin.
B. Oestrogen.
C. Parathyroid hormone.
D. Progesterone.

Secondary cell wall of sclerenchyma cells is impregnated with_________________?

A. Pectin.
B. Peptidoglycan and murein.
C. Lignin.
D. Cellulose.

Biology Mcqs

Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency?

A. Hypocalcaemia Tatanic spasms.
B. Tetany
C. Rickets.
D. Osteomalacis.

Among the followings which is the most longest supportive cell?

A. Tracheids
B. Trachea
C. Sclereids
D. Collenchyma cells

Which of the following statement about osteoporosis is incorrect.

A. It is common in old age.
B. Bone eating process takes over bone formation process.
C. There is reduction of bone mass and change in chemical composition of the matrix
D. It results from estrogen deficiency.

An increrase in plant girth due to activity of _____________ is called secondary growth?

A. Pith.
B. Cork cambium
C. Vascular cambium.
D. Both a and c

Which of the following statements about fractures in old age is incorrect?

A. Occur as a result of bone being thin and weak.
B. They are more common than in adult age.
C. Due to good blood supply it results in quick healing.
D. It involves osteoblasts and osteocytes.

If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?

A. Open reduction.
B. Open fixation.
C. Closed Fixation.
D. Immobilization

Vascular Cambium initially appears as actively dividing cells between_________________?

A. Primary xylem and secondary phloem.
B. Primary Xylem and secondary xylem.
C. Primary xylem and primary phloem
D. Secondary xylem and secondary phloem.

A fracture hematoma has____________?

A. Destructive properties.
B. Healing properties.
C. Neutralizing properties.
D. Dead cells

Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of ____________?

A. Chemosastic movement
B. Chemotactic movement
C. Chemotropic movement
D. Haptonastic movement

Which of the following cells are involved in soft callus formation?

A. Fibroblast and osteoblast.
B. Osteoclast and osteocyte
C. Osteoblast and osteoclast.
D. Onteocyte and osteoblast

Bony callus formation completes in___________?

A. 3-4 weeks.
B. 2-3 weeks
C. 2-3 months.
D. 3-4 months.

The place of attachment of leaf with the shoot is called__________?

A. Pit.
B. Pith.
C. Pulvinus
D. Ecdysone

Which of the following is a uni-nucleated cell?

A. A smooth muscle cell.
B. A skeletal muscle cell.
C. A cardiac muscle cell.
D. All of these

Rapid movement of leaves of mimosa on touching is an example of _____________?

A. Turgor movement
B. Tropic movements.
C. Nastic movement
D. Growth movement

The contraction of which of the following muscle fibers, is controlled by hormones?

A. A smooth muscle
B. A skeletal muscle.
C. A cardiac muscle
D. All of these

Roots of a plant show______________?

A. Positive geotropism of stem and roots
B. Negative phototropism and positive geotropism
C. Negative tactic movement and positive tropic movement
D. Positive phototropism and negative geotropism

Why skeletal muscles are called striated muscles?

A. Alternating dark and light bands appear on their surface when visualized by naked eye.
B. They appear darker than smooth muscles by naked eye.
C. Alternating dark and light bands appear on their surface when visualized via a microscope.
D. All of these

Epinasty is controlled by_____________?

A. Abscisins
B. Gibberellins
C. Auxins
D. Cytokinins

Which of the following statements is incorrect about skeletal muscle fibers?

A. They are 10 – 100 ?m in diameter & surrounded by sarcolemma
B. They are multinucleated.
C. They contain O2 storing molecules called hemoglobin.
D. Their cytoplasm contains high concentration of carbohydrates

Gibberellins is an example of_________________?

A. Growth hormone
B. Growth stimulator
C. Growth inhibitor
D. None of these

A smallest contractile unit of muscle contraction called sarcomere is the area between two:

A. M- Line
B. H- zone
C. Z- Line
D. A band

Which of the following animal has a hydrostatic skeleton?

A. Earthworm
B. Tape worm
C. Round worm
D. Pin worm

Diameter of thick filament is____________?

A. 8 nm
B. 7 nm.
C. 16nm
D. 10-100 ?m.

In an annelids, the contraction of circular muscle results in___________?

A. Shortening of the body.
B. Lengthening of the body.
C. Widening of body
D. Thinning of body

The most important function of troponin is___________?

A. To bind with tropomyosin.
B. To bind with actin
C. To bind with Ca2+ ions.
D. All of these

Which of the following statement is incorrect about Molluscans?

A. They are surrounded by single or double pieces of hard skeleton.
B. They have hydrostatic skeleton.
C. Their shell grows as the animal grows.
D. They move by tube feet

If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules:

A. 5
B. 9
C. 6
D. 7

Which one of the following forms the blk of exoskeleton of an arthropod?

A. Ectocuticle
B. Procuticle
C. Epicuticle
D. None of these

What happens during muscle contraction to the length of each myosin and action filament?

A. Z- lines get closer
B. 1 band elongates
C. A band becomes short
D. There is no change in sarcomere

Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.

A. Binding sites of actin get attached to the myosin head.
B. Ca2+ goes back inside sarcoplasmic reticulum.
C. Tropomyosin gets removed from the binding sites of actin filaments.
D. Troponin uncovers the actin binding sites.

Exoskeleton of a marine snail is composed of________________?

A. CaSO4
B. CaCO3
C. CaPO4
D. SiO2

Biology Mcqs

Rigor mortis i.e, stiffening of body after death results from__________?

A. Decrease in body temperature after death.
B. Unavailability of ATP, which is necessary to break the link between actin and myosin.
C. Accumulation of rigid proteins molecules in sarcoplam.
D. Death of tissue due to unavailability of O2.

Which of the following statement about an arthropod exoskeleton is incorrect?

A. It provides muscle attachment
B. It contains joints, for the same purpose as present in human skeletal system
C. It permits gaseous exchange
D. Like all the other types of exoskeleton, they lack sensation

Ecdysone is_________________?

A. A newly formed exoskeleton in authropods
B. An enzyme that digest endocuticle during an arthropodal ecdysis
C. A hormone that regulates moulting in arthropods
D. A process that involves moulting

Endoskeleton is secreted by?

A. Endoderm.
B. Ectoderm.
C. Mesoderm.
D. All of these

Which of the following statement about fatigue is correct?

A. Ionic imbalance may also cause it.
B. Lactic acid accumulation turns pH in acidic range leading to muscle ache.
C. The major event in it is accumulation of lactic acid.
D. All of these

Tetany is caused by__________?

A. Hypocalcemia
B. Clostridum tetani.
C. Hypercalcemia
D. Low O2 level

Collagen fibers of bone are hardened by deposition of_____________?

A. Ca & PO4
B. CaSO4
C. CaCO3
D. SiO2

Which one of the following is an example of a non-elastic connective tissue?

A. Muscles.
B. Tendon
C. Ligaments.
D. None of these

Which one of the following is avascular structure?

A. A spongy bone.
B. A compact bone.
C. Cartilage
D. All of these

Which of the following muscle is an antagonistic member of Biceps brachii?

A. Brachialis.
B. Bracheoradialis
C. Intercostals
D. Triceps

Which of the following bone is not present in the hind-limb?

A. Tibia
B. Femur
C. Radius
D. Fibula

Insertion of Biceps is on_________?

A. Scapula
B. Radius
C. Olecronon process of ulna.
D. Ulna

How many bones are present in the wrist?

A. 6 bones
B. 4 bones
C. 8 bones
D. 14 bones

Which of the following statement is incorrect regarding the locomotion in Euglena?

A. Myonemes can change the direction of the body by making it to shorten from anterior to the posterior pole.
B. Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward.
C. Move with the help of flagellum, attached to the anterior pole of the body.
D. None of these

Which of the following bones bones are present in the plam of hand?

A. Phalanges
B. Metacarpals
C. Carpals
D. Metatarsals

Which of the following animal uses Setae and Muscles for their Iocomotion?

A. Snail
B. Cockroach
C. Earthworm
D. Star fish

How many vertebrae are present in vertebral column of man?

A. 33 vertebrae
B. 25 vertebrae
C. 33 pairs of vertebrae
D. 31 vertebrae

Which of the following vertebrates have a fish-like body?

A. Aves
B. Reptiles
C. Amphibians
D. Mammals.

How many vertebrae are present in coccyx?

A. 7
B. 9
C. 12
D. 4

Which of the following pairs of fins in a fish body are paired?

A. Tail and anal
B. Pectoral and Pelvic.
C. Dorsal and ventral.
D. All of these

Biology Mcqs

How many vertebrae are present in thoracic region?

A. 5
B. 12
C. 7
D. 4

Among the following organisms which shows the best adaptations for locomotion?

A. Earthworm.
B. Amoeba.
C. Reptiles
D. Amphibians.

How many vertebrae are in sacrum?

A. 12
B. 7
C. 5
D. 4

Which of the following is the swiftest form of the locomotion?

A. Digitigrade
B. Plantigrade
C. Unguligrade
D. Hopping

S-band locomotion is characteristically seen in___________?

A. Fish like mammals.
B. Cartilaginous fish.
C. Bony fish
D. All fishes.

How many vertebrae are present in lumbar region?

A. 12
B. 7
C. 5
D. 4

Which of the following bones are present in pectoral girdle?

A. Scapula
B. Clavicle
C. Both of these
D. None of these

There are __________ types of nutrients needed by plants besides light to carry out photosynthesis

A. Four
B. Three
C. Two
D. Five

The site/s where most of the uptake of water and minerals take place is/are__________?

A. Root hairs
B. Underground stem
C. Root cells
D. All of these

The uptake of water in plants involves__________?

A. Passive transport
B. Active transport
C. Both of these
D. None of these

The membrane of vacuoles is known as__________?

A. Tanoplast
B. Tonoplast
C. Vacuoloplast
D. All of these

The diffusion of ions along with water also takes place by mass flow system along the ________ path?

A. Tonoplast
B. Apoplast
C. Vacuolar
D. Symplast

Active transport is dependent on____________?

A. Photophosporylation
B. Respiration
C. Photosynthesis
D. None of these

In plants, the neighbouring cells are connected with one another by__________?

A. Plasmodesmata
B. Cell walls
C. Vacuoles
D. Both ‘A’ & ‘B’

In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.

A. Symplast
B. Apoplast
C. Tonoplast
D. Vacuolar.

Cytoplasmic strands that extend through pores in adjacent cell walls are known as___________?

A. Symplasts
B. Pseudopods
C. Plasmodesmata
D. Pili

In plants, water potential is determined by major factors?

A. Four
B. Three
C. Two
D. Five

The pressure generated when water enters & inflates plant cells is called ___________ potential?

A. Osmotic
B. Water
C. Pressure
D. Solute

The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

A. Active transport
B. Osmosis
C. Diffusion
D. None of these

___________ potential is the measure of the change in water potential of a system due to the presence of solute molecules?

A. Pressure
B. Osmotic
C. Both of these
D. None of these

___________ component of cell wall has great affinity with water?

A. Cellulose
B. Lignin
C. Pectin
D. All of these

Commonly in other plants than tall ones the speed of upward movement of water is____________?

A. 7 mh-1
B. 1 mh-1
C. 8mh-1
D. 4 mh-1

Exceptionally the positive hydrostatic pressure generated by root pressure is about___________?

A. 1000 Kpa
B. 800 Kpa
C. 600 Kpa
D. 900 Kpa

Cuticular transpiration is _________ of total transpiration?

A. 7-9%
B. 5-7%
C. 6-8%
D. 4-6%

All plants do not possess___________?

A. Lenticels
B. Stomata
C. Cuticle
D. All of these

Lenticular transpiration is ___________ of total transpiration?

A. 1-3%
B. 2-3%
C. 1-4%
D. 1-2%

Introduction of vaccine within the body to produce immunity is an example of____________?

A. Artificially induced active immunity
B. Artificially induced passive immunity
C. Naturally induced active immunity
D. Naturally induced passive immunity

The flow of lymph is maintained by__________?

A. Breathing movements
B. Movement of viscera
C. Valves
D. All of these

It is the discharge of blood from blood vessels?

A. Cerebral infarction
B. Myocardial infarction
C. Cerebral Hemorrhage
D. Thromboembolism

All of the follwing are blood clots except:___________?

A. Embolus
B. Thrombus
C. Atheroma
D. Hematoma

It is the measure of force with which blood pushes up against the walls of blood vessels.

A. Cardiac output
B. Stroke volume
C. Blood pressure
D. Blood flow

Which of the following have thickest walls?

A. Arteries
B. Capillaries
C. Veins
D. None of these

QRS complex represents____________?

A. Atrial diastole
B. Ventricular systole
C. Atrial systole
D. Ventricular diastole

Biology Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests

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