biology Mcqs
701. Notochord is present throughout life in___________?
comments icon0

A. Vertebrates

B. Chordates

C. Cephalochordates

D. Urochordates

702. In which of the following pigments major energy reserves and cell wall are like plants?
comments icon0

A. Rhodophyta

B. Chrysophyta

C. Phaeophyta

D. Chlorophyta
703. In acoelomates gut is ________ in origin.
comments icon0

A. Mesodermal

B. Ectodermal

C. Endodermal

D. None of these

704. Example of bacteria requiring low concentration of oxygen is__________?
comments icon0

A. spirocheta

B. Pseudomonas

C. E-coli

D. Campylobactor
705. Mastication is carried out by__________?
comments icon0

A. Smooth muscles

B. Teeth

C. All of these

D. Tongue

706. The organs of locomotion in annelids are__________?
comments icon0

A. Setae</strong>

B. Parapodia

C. Hydrostatic skeleton

D. Muscles

707. In some cases the blastomere can produce complete embryo the cleavage will be___________?
comments icon0

A. Spiral and indeterminate

B. Spiral and determinate

C. Radial and determinate

D. Radial and indeterminate
708. In which of the following component of the body, lactic acid fermentation takes place?
comments icon0

A. Liver

B. Brain

C. Heart

D. Muscles
709. Rigor mortis i.e, stiffening of body after death results from__________?
comments icon0

A. Death of tissue due to unavailability of O2.

B. Decrease in body temperature after death.

C. Accunulation of rigid proteins molecules in sarcoplam.

D. Unavailability of ATP, which is necessary to break the link between actin and myosin.
710. Which of the following statements is incorrect about skeletal muscle fibers?
comments icon0

A. They are 10 100 ?m in diameter & surrounded by sarcolemma

B. They contain O2 storing molecules called hemoglobin.

C. They are multinucleated.

D. Their cytoplasm contains high concentration of carbohydrates

711. Haemoglobin can be almost completely oxygenated by an oxygen pressure of __________ of mercury.
comments icon0
A. 100 mm

B. 10 cm

C. 10 mm

D. 60 mm

712. Co-ordination results in_____________?
comments icon0

A. Organization of body functions

B. Integration of body functions

C. Regulation of body functions

D. All of these
713. In which of the following joint muscles are arranged in the same plane as that of joint?
comments icon0

A. Between humerus and scapula

B. Between femur and tibia.

C. Between ulna and scapula

D. Between radius and ulna.

714. Lungs are spongy due to the presence of million of___________?
comments icon0

A. Parabronchi

B. Bronchioles

C. Air sacs

D. Alveoli
715. In most birds air sacs are ____________ in number?
comments icon0

A. 4

B. 10

C. 3

D. 9
716. Why skeletal muscles are called striated muscles?
comments icon0

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. All of these

D. Alternating dark and light bands appear on their surface when visualized via a microscope.
717. C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:____________?
comments icon0
A. Aerobic respiration

B. Anaerobic respiration

C. Photosynthesis

D. Respiration

718. Arterial blood contains _________ of CO2 per 100 ml of blood
comments icon0

A. 54 ml

B. 64 ml

C. 50 ml

D. 60 ml

719. Oxygen contents per liter of air is____________?
comments icon0

A. 100ml

B. 10 ml

C. 200 ml

D. 100 ml

720. The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood.
comments icon0
A. 20 ml

B. 40 ml

C. 10 ml

D. 30 ml

721. Specialized protective coverings around megasporangium which vary in number are called_________________?
comments icon0

A. Sporangium

B. Integuments

C. Ovule

D. Pericarp

722. Vocal cords are stretched across_______?
comments icon0

A. Larynx

B. Pharynx

C. Golttis

D. None of these

723. Respiratory distress syndrome is common especially for infants with a__________?
comments icon0

A. Less than 8 month

B. Less than 9 month

C. More than 9 month

D. Less than 7 month
724. Lungs are covered with double layered thin membranous sac called___________?
comments icon0

A. Disphragm

B. Pleura

C. Rib cage

D. Pericardium

725. Which of the following promotes growth in plants?
comments icon0

A. Photorespiration

B. Calvin cycle

C. Both of these

D. None of these

726. In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by__________________?
comments icon0

A. Mitosis

B. Meiosis

C. Both depending upon the conditions

D. None of these

727. During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?
comments icon0

A. 5?10

B. 15-20

C. 16-30

D. 6?12

728. Fibrous capsule surrounding synovial joints may be thickened at some places to form:
comments icon0

A. Synovial membrane.

B. Muscles.

C. Ligaments.

D. Tendon

729. Which of the following statement about neuron is incorrect___________________?
comments icon0

A. They not only conduct impulses but also generate them

B. They may show limited regenerative capabilities

C. Like all the living cell, when they mature and divide to form similar cells

D. They are not the only cellular component of nervous system

730. Number of spiracles present in the thorax of cockroach is___________?
comments icon0

A. 3

B. 5

C. 4

D. 2

731. The air spaces may comprise upto _________ of total volume of leaf surface?
comments icon0
A. 40%

B. 50%

C. 30%

D. 20%

732. Bony callus formation completes in___________?
comments icon0

A. 2-3 weeks

B. 3-4 weeks.

C. 3-4 months.

D. 2-3 months.
733. Bacteriochlorophylls does not include________________?
comments icon0
A. Chlorophyll a

B. Chlorophyll e

C. Chlorophyll d

D. Chlorophyll c

734. How many bones are present in the wrist?
comments icon0

A. 4 bones

B. 14 bones

C. 8 bones

D. 6 bones

735. Which of the following vertebrates have a fish-like body?
comments icon0

A. Reptiles

B. Amphibians

C. Mammals.

D. Aves

736. Active site of Rubisco is evolved to bind?
comments icon0
A. All of these

B. O2

C. CO2

D. H2O

737. Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency?
comments icon0

A. Hypocalcaemia Tatanic spasms.

B. Osteomalacis.

C. Rickets.

D. Tetany

738. The zygote formed in liverworts is___________?
comments icon0

A. Mulicellular

B. Multinucleate

C. Unicellular

D. None of these

739. Insulin and glucagons are __________ in nature.
comments icon0

A. Amino acid derivative

B. Protein

C. Steroid

D. Polypeptide

740. Number of spiracles present in cockroach is___________?
comments icon0
A. 20

B. 10

C. 30

D. 15

741. Which of the following is second largest part of the brain_______________?
comments icon0

A. Thalamus

B. Hypothalamus

C. Cerebrum

D. Cerebellum
742. Acromegaly is caused due to oversecretion of____________?
comments icon0

A. STH

B. Thyroxin

C. ACTH

D. TSH

743. In an annelids, the contraction of circular muscle results in___________?
comments icon0

A. Shortening of the body.

B. Thinning of body

C. Lengthening of the body.

D. Widening of body

744. The organisms able to use sunlight directly as a source of energy are_____________?
comments icon0

A. Fungi

B. Animals

C. Plants

D. Omnivores

745. Breaking of terminal phosphate of ATP releases about ___________ Kcal of energy?
comments icon0
A. 7.3

B. 6.3

C. 6.1

D. 7.1

746. Hydra has___________?
comments icon0

A. All of these

B. Nerves

C. Neuron-cells

D. Brain

747. Any change in the environment of an organism is called___________?
comments icon0

A. Reaction

B. Stimulus

C. Variation

D. Response

748. Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips___________________?
comments icon0

A. Pacinian corpuscles

B. None of these

C. Meissners Corpuscles

D. Hair end organs

749. Secretin is a hormone produced by___________?
comments icon0

A. Pancreas

B. Stomach

C. Duodenum

D. Liver

750. Horsetails are included in class of____________?
comments icon0

A. Pteropsida

B. Lycopsida

C. Psilopsida

D. Sphenopeida