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Biology 1st QA

Total questions: 120

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

The movement of organic materials (food) takes place through:

a)

Phloem

b)

Vessels

c)

Tracheid

d)

Xylem

2.

What regulates the flow of water through the xylem?

a)

The number of companion cells in the phloem

b)

Passive transport by the endodermis

c)

The evaporation of water from the leaves

d)

Active transport by sieve-tube membrane

3.

Phloem transport of sucrose can be described as going from 'source to sink'. Which of the following would not normally function as a sink?

a)

Both 'b' and 'c'

b)

Mature leaf

c)

Storage organ

d)

Growing root

4.

Human plasma proteins include which of the following?

a)

I and III

b)

Haemoglobin

c)

Fibrinogen

d)

I and II

5.

Which of these are involved in the clotting of blood?

a)

Platelets

b)

Globulin

c)

Haemoglobin

d)

Albumin

6.

In the human heart, blood returning from the lungs first drains into the:

a)

Right atrium

b)

Left atrium

c)

Right ventricle

d)

Left ventricle

7.

Root hairs are most important to a plant because they:

a)

Store starch

b)

Contain xylem tissues

c)

Provide a habitat for nitrogen fixing bacteria

d)

Increase the surface area for absorption

8.

Part of the root between the epidermis and endodermis is called:

a)

Phloem

b)

Root hair

c)

Cortex

d)

Xylem

9.

Movement of water molecules from the area of higher water potential to the area of lower water potential is called:

a)

Osmosis

b)

Water potential

c)

Diffusion

d)

Active transport

10.

Deficiency of vitamin K causes:

a)

Rickets

b)

Anemia

c)

Scurvy

d)

Beriberi

11.

Period of rapid growth and development is called:

a)

Adult hood

b)

Childhood

c)

Adolescence

d)

Both 'a' and 'c'

12.

An animal that migrates great distances would obtain the greatest benefit from storing its energy as:

a)

Carbohydrates

b)

Fats

c)

Protein

d)

Minerals

13.

Which of the following vitamins is correctly associated with its use?

a)

Vitamin E → Protection of skin from cancer

b)

Vitamin C → Curing rickets

c)

Vitamin A → Incorporated into the visual pigment of the eye

d)

Vitamin K → Production of white blood cells

14.

Which of the following statements describes pepsin?

a)

It begins the hydrolysis of proteins in the stomach.

b)

It is manufactured by the pancreas.

c)

It helps stabilize fat-water emulsions.

d)

It splits maltose into monosaccharides.

15.

Fundamental molecule produced during photosynthesis is:

a)

Fatty acid

b)

Amino acid

c)

Glucose

d)

Nucleotide

16.

Loss of internal water of plant in the form of vapours from aerial parts of plants is called:

(a)  

17.

Opening and closing of stomata is regulated by (a)   cells.

18.

A type of cancer that affects the blood, bone marrow and lymphatic system called:

(a)  

19.

Pumping of blood by the rhythmic pulsation of heart throughout the body is called:

(a)  

20.

Relaxation of heart muscles and allowing the chambers to fill with blood called:

(a)  

21.

Dead cells of xylem vessels arranged vertically have empty space inside called:

(a)  

22.

Colourless, irregular in shape, nucleated and larger sized cell than R.B.Cs called:

(a)  

23.

Inherited condition that affects the blood hemoglobin called:

(a)  

24.

(a)   deficiency is associated with decreased cognitive abilities and resistance to diseases.

25.

Nutrients that are needed in the highest concentration called:

(a)  

26.

Nutrients that are needed in the highest concentration called:

(a)  

27.

Each gram fat supplies the body with about (a)   calories.

28.

The breakdown of food molecules to release energy is called:

(a)  

29.

All are characters of enzymes except:

a)

Enzyme speed up a biochemical reaction.

b)

Enzymes are sensitive to minor change in pH

c)

Enzyme activity enhanced by inhibitors

d)

Enzyme portion where substrate attach called active site

30.

Enzymes are:

a)

Steroid in nature

b)

Protein in nature

c)

Lipid in nature

d)

Carbohydrate in nature

31.

Metabolic reactions are:

a)

I and II only

b)

Constructive reactions

c)

Destructive reactions

d)

Inhibiting reactions

e)

I only

32.

The point where the enzyme is most active is known as:

a)

Neutral pH

b)

Acidic pH

c)

Basic pH

d)

Optimum pH

33.

Active site continuously changes it shapes until the substrate do not bind to it, is statement of:

a)

Induce fit model

b)

Lock and key model

c)

Fluid mosaic model

d)

Both “a” and “b”

34.

Select the mismatched:

a)

Proteases → Carbohydrate

b)

Lipases → Lipids

c)

Trypsin → Protein

d)

All are correctly matched

35.

Chemical reaction requires particular conditions to carry down at proper rate, especially:

a)

Temperature and Nature

b)

Nature and Pressure

c)

Nature and Structure

d)

Temperature and Pressure

36.

All are factors affecting enzyme activity except:

a)

pH

b)

Substrate concentration

c)

Organic solvent

d)

Temperature

37.

Rate of reaction will increase when temperature:

a)

Increases

b)

Decreases

c)

Below 10°C

d)

Both “a” and “c”

38.

Choose the correct statement regarding lock and key model.

a)

Enzyme and substrate posses' specific complementary geometric shapes.

b)

Active site of enzyme is flexible

c)

Active site continuously changes

d)

All above statements are correct.

39.

Reactions of an organism are collectively called:

a)

Metabolic reactions

b)

Anabolic reactions

c)

Catabolic reactions

d)

complex reactions

40.

The phenomenon of chemical activity in an organism is called:

a)

disjunction

b)

Terminalization

c)

Anabolism

d)

Metabolism

41.

The metabolic activities are always of:

a)

Two types

b)

Three types

c)

Four types

d)

Five types

42.

In constructive reactions, large molecules are formed to form a structure of cell or body. These reaction ere called:

a)

Metabolic reactions

b)

Anabolic reactions

c)

Catabolic reactions

d)

complex reaction

43.

In destructive reactions, large molecules breakdown in small molecules to produce energy is called:

a)

metabolic reactions

b)

anabolic reactions

c)

catabolic reactions

d)

complex reaction

44.

The minimum amount of energy, a reaction requires to initiate, is called:

a)

metabolic energy

b)

anabolic energy

c)

catabolic energy

d)

activation energy

45.

The bio-catalysts which facilitate chemical reaction by lowering activation energy is called:

a)

enzymes

b)

hormones

c)

inhibitors

d)

substrate

46.

Its action allows biological reaction to proceed rapidly at relatively low temperature and pressure tolerable by living organism:

a)

substrate

b)

hormones

c)

enzymes

d)

inhibitor

47.

Enzymes are bio-catalyst made up of mostly:

a)

chitin

b)

carbohydrates

c)

lipid

d)

protein

48.

Enzymes have specific shape with three dimensionally folded chains of:

a)

ether

b)

amino acid

c)

amide

d)

ester

49.

Reactants of enzyme are called:

a)

substrate

b)

inhibitor

c)

hormones

d)

yeast

50.

A small portion of enzyme where substrate attaches with enzyme is called:

a)

substrate

b)

inhibitor

c)

hormones

d)

active site

51.

Enzymes are sensitive to a minor change in:

a)

pH, pressure and density

b)

PH, temperature and pressure

c)

pH, substrate concentration and pressure

d)

pH, temperature and substrate concentration

52.

Activity of enzymes can be enhanced by:

a)

inhibitors

b)

cofactor

c)

activator

d)

hormones

53.

By inhibitor, the activity of enzymes can be:

a)

increased

b)

decreased

c)

remained the same

d)

first increased & then decreased

54.

If the amount of the enzyme is kept constant and the substrate concentration is then gradually increased, the reaction velocity will:

a)

decrease

b)

increase

c)

decrease until it reaches a maximum

d)

increase until it reaches a maximum

55.

The protein nature of the enzymes makes them extremely sensitive to:

a)

thermal changes

b)

pressure changes

c)

density changes

d)

substrate changes

56.

Enzymes activity occurs within a:

a)

narrow range of pressures

b)

wide range of pressures

c)

narrow range of temperatures

d)

wide range of temperatures

57.

The protein nature of the enzymes makes them sensitive to:

a)

pressure changes

b)

pH

c)

density changes

d)

Kinetic energy

58.

All enzymes work at their maximum rate at:

a)

wide range of pressure

b)

narrow range of pressure

c)

wide range of pH

d)

narrow range of pH

59.

The point where the enzyme is most active is known as:

a)

active pH

b)

maximum pH

c)

optimum pH

d)

cutoff pH

60.

It works at a low pH i.e., it is highly acidic.

a)

Pepsin

b)

Trypsin

c)

proteases

d)

lipase

61.

It works at a high pH is:

a)

Pepsin

b)

Trypsin

c)

proteases

d)

lipase

62.

Most enzymes work at neutral pH:

a)

6.2

b)

6.4

c)

7.2

d)

7.4

63.

In 1894, the lock and key model theory was first postulated by:

a)

Zachanan Janson

b)

Walter Fleming

c)

Emil Fischer

d)

Daniel Koshland

64.

In 1958, the induced fit model suggested by:

a)

Zachanan Janson

b)

Walter Fleming

c)

Emil Fischer

d)

Daniel Koshland

65.

In the human body, the number of known enzymes is more than:

a)

1000

b)

700

c)

500

d)

100

66.

These are the enzymes which catalyzes the proteins.

a)

Lipase

b)

Proteases

c)

Pepsin

d)

Trypsin

67.

This enzyme acts on lipids only.

a)

Lipase

b)

Proteases

c)

Pepsin

d)

Trypsin

68.

Chromosomes contain heredity units called:

a)

Chitin

b)

Apoptosis

c)

Genes

d)

Diplotene

69.

A chromosome has:

a)

two parts

b)

three parts

c)

four parts

d)

five parts

70.

The chromosomes are of different types, depending upon:

a)

size of chromosomes

b)

shape of chromosomes

c)

length of its arms

d)

position of centromere

71.

Chromosomes with equal arms are called:

a)

sub-meta centric

b)

metacentric

c)

sub-telocentric

d)

telocentric

72.

Chromosomes with unequal arms are known as:

a)

sub-meta centric

b)

metacentric

c)

sub-telocentric

d)

telocentric

73.

Rod like chromosomes with one arm very small and other very long.

a)

sub-meta centric

b)

metacentric

c)

sub-telocentric

d)

telocentric

74.

Location of centromere at the end of chromosomes.

a)

sub-meta centric

b)

metacentric

c)

sub-telocentric

d)

telocentric

75.

A localized group of organisms that belong to the same species is called a:_______

a)

Biosphere

b)

Community

c)

Ecosystem

d)

Population

76.

Increased quantity and quality of fish production:_______

a)

Fisheries

b)

Farming

c)

Animal husbandry

d)

Forestry

77.

Study of remote past organic life, with the help of fossils:______

a)

Entomology

b)

Paleontology

c)

Taxonomy

d)

Histology

78.

Laws and techniques of physics are applied to explain the living processes of life:________

a)

Biometry

b)

Biostatistics

c)

Biophysics

d)

Bio-economics

79.

Choose the incorrect statement:

a)

Six elements such as C, H, O, N, S and P are called basic elements of life.

b)

Foundation of life based on chemicals.

c)

Members of different species form population.

d)

Part of earth where life exists is called biosphere.

80.

Science of diagnosis and treatment of diseases:_____

a)

Agriculture

b)

Medicine

c)

Surgery

d)

Both B and C

81.

Similar cells combine together to form:_______

a)

Organs

b)

System

c)

Tissue

d)

Body

82.

Scientific name of frog is: _______

a)

Palaeon

b)

Rana tigrina

c)

Periplaneta

d)

Pheretima

83.

Select the correct sequence of biological organization:

a)

Atom → Cell → Tissue → Molecule → Organ

b)

Atom → Tissue → Cell → Molecule → Organ

c)

Atom → Molecule → Cell → Tissue → Organ

d)

Atom → Cell → Molecule →Tissue → Organ

84.

Volvox is a polyphyletic genus of:______

a)

Green algae

b)

Red algae

c)

Brown algae

d)

None of these

85.

Select the correct sequence of biological method:

a)

Law → Theory → Reasoning → Hypothesis

b)

Hypothesis → Theory → Law → Reasoning

c)

Hypothesis → Reasoning → Theory → Law

d)

Law → Hypothesis → Reasoning → Theory

86.

Select the odd one

a)

Theory

b)

Law

c)

Hypothesis

d)

Ratio

87.

Field of research that examines mathematical representations of biological system called ________

a)

Ratio

b)

Mathematical biology

c)

Proportion

d)

Law

88.

Biological method involves all of the following except:

a)

Data collection

b)

Observation

c)

Experiment

d)

Proportion

89.

Scientific reasoning moves from specific to general:

a)

Inductive

b)

Deductive

c)

Observation

d)

Both a and b

90.

Quantitative observation is the use of

a)

Senses

b)

Equipment

c)

Guess

d)

Ratio

91.

Equation stating that two ratios are equal

a)

Ratio

b)

Proportion

c)

Guess

d)

Senses

92.

The comparison of two values is called _______.

a)

Ratio

b)

Proportion

c)

Graph

d)

Table

93.

What is a hypothesis?

a)

The same thing as an unproven theory.

b)

A tentative explanation that can be tested and is falsified.

c)

A verifiable observation.

d)

A fact based on quantitative data that is falsified.

94.

In data organization, which method is mostly useful?

a)

Table

b)

Graph

c)

Ratio

d)

Both a and b

95.

Which of the following is the correct way of writing a scientific name of an organism?

a)

Houbara bustard

b)

E.coli

c)

Alium Cepa

d)

canis lupis

96.

Select the mismatched

a)

Plantae → Pteridophyta

b)

Fungi → Mucor

c)

Protista → Paramecium

d)

Animalia → Amoeba

97.

Identify the correct sequence of classifying an organism.

a)

Species → Genus → Kingdom → Phylum → Class → Order → Family

b)

Kingdom → Phylum → Class → Order → Family → Genus → Species

c)

Kingdom → Phylum → Class → Family → Order → Genus → Species

d)

Species → Genus → Class → Phylum → Order → Kingdom → Family

98.

All are involve in classification except

a)

Analogous

b)

Homologous

c)

Cytology

d)

Genetics

99.

In the taxonomic hierarchy choose the term which encompasses all other in the list

a)

I and II

b)

II

c)

II and III

d)

IV

100.

In four kingdom classification, kingdom Metaphyta includes all of the following except.

a)

Algae

b)

Angiosperm

c)

Gymnosperm

d)

Bryophyta

101.

In five kingdom system virus placed in

a)

Monera

b)

Protista

c)

Plantae

d)

None of these

102.

Biological name of cat

a)

Felis catus

b)

Azadirachta indica

c)

Alium Cepa

d)

Canis lupis

103.

Members of which kingdom have cell wall and are all heterotrophic

a)

Monera

b)

Protista

c)

Plantae

d)

Fungi

104.

____ classification occur on homologous or an analogous characters.

a)

Morphological

b)

Cytological

c)

Genetical

d)

All the above

105.

____ means external features of an organism.

a)

Morphology

b)

Homologous

c)

Analogous

d)

Taxonomy

106.

_______ means Similar in structure.

a)

Morphology

b)

Homologous

c)

Analogous

d)

Taxonomy

107.

_______ means different in structure but similar in function.

a)

Morphology

b)

Homologous

c)

Analogous

d)

Taxonomy

108.

The smallest and basic unit of classification is _____.

a)

order

b)

species

c)

genus

d)

family

109.

The science of classification is called ______.

a)

Morphology

b)

Homologous

c)

Analogous

d)

Taxonomy

110.

What is responsible for the high resolution of the electron microscope?

a)

High magnification

b)

Short wavelength of the electron beam

c)

Use of heavy metals strains

d)

Very thin section

111.

What is a function of the rough endoplasmic reticulum?

a)

Aerobic respiration

b)

Intracellular digestion

c)

Synthesis of steroids

d)

Synthesis of protein

112.

Which statement about the fluid mosaic model of membrane structure is correct?

a)

The less unsaturated the fatty acid, the more fluid nature.

b)

The more unsaturated the fatty acid, the more fluid nature.

c)

Higher the temperature, less fluid nature.

d)

The lower the temperature, more fluid nature

113.

Select the odd one

a)

Active transport

b)

Diffusion

c)

Facilitated diffusion

d)

Osmosis

114.

Trace the correct pathway of protein produce from protein factories

a)

RER → Ribosome → Golgi body → Lysosome

b)

Ribosomes → RER → Golgi body → Lysosome

c)

Golgi body → RER → Ribosome → Lysosome

d)

RER → Ribosome → Lysosome → Golgi body

115.

Cell organelle found in animal cell and help intracellular digestion

a)

Lysosome

b)

Ribosomes

c)

Mitochondria

d)

Golgi apparatus

116.

Select the mismatched

a)

Plastids → Storage of chemicals

b)

Centriole → Help in cell division

c)

Ribosomes → Synthesis of steroids

d)

Mitochondria → Synthesis of ATP

117.

In 1665, Cell was first observed by (a)   , an English scientist

118.

The nucleus of the cell was first observed by (a)   .

119.

Plants do exchange of gases through:

a)

Stomata

b)

Stem

c)

All of these

d)

Roots

120.

Each stoma is formed by ___ guard cell

a)

1

b)

2

c)

3

d)

4

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