2265 + Mcqs in Science McqOptions

1.	When used to describe a plant, the word deciduous means that
A.	The plant is perennial
B.	The plant sheds its leaves each year
C.	The plant is a shrub
D.	All of the above
Answer» C. The plant is a shrub

Discussion

2.	In spinach, pollination takes place by means of:
A.	Water
B.	Insects
C.	Birds
D.	Wind
Answer» E.

Discussion

3.	Chlorophyll formation takes place within a light wavelength of _________:
A.	150-200
B.	200-300
C.	300-675
D.	700-900
Answer» D. 700-900

Discussion

4.	A whorl of leaves arising at the base of plants is:
A.	Scales
B.	Reflexed
C.	Rosette
D.	None of these.
Answer» D. None of these.

Discussion

5.	Melons belong to the family
A.	Cucurbitaceae
B.	Solanaceae
C.	Crucifereae
D.	None of these
Answer» B. Solanaceae

Discussion

6.	Dormancy is a function of interaction of growth promoter like GA and growth inhibitorlike _________:
A.	ABA
B.	Cycocell
C.	Alar
D.	Paclobutrazole
Answer» B. Cycocell

Discussion

7.	Both asphalt and concrete are used for hard surfacing driveways. Which of thefollowing is true for asphalt?
A.	The thickness of an asphalt needed for a driveway is less than the thickness of concretevneeded for a driveway.
B.	Asphalt should be pitched to promote drainage
C.	Asphalt does not need a porous base material
D.	Asphalt is crowned to promote drainage
Answer» D. Asphalt is crowned to promote drainage

Discussion

8.	Self pollination is a form of:
A.	Inbreeding
B.	Out breeding
C.	Random mating
D.	None of these
Answer» B. Out breeding

Discussion

9.	According to international standards medicinal plants are those plants which haveactive ingredients in the range of:
A.	10%
B.	20%
C.	40-60%
D.	none of above
Answer» E.

Discussion

10.	Vine of crop of bottle gourd is not staked during:
A.	Summer season
B.	Rainy season
C.	Early season
D.	Late season
Answer» B. Rainy season

Discussion

11.	Which enzyme is involved in ethylene synthesis;
A.	ACC synthase
B.	ACC oxidase
C.	Endoploygalacturonase
D.	a & b
Answer» E.

Discussion

12.	Citrus seeds can be stored with Charcoal at following temperature in dryconditions.
A.	0-3°C
B.	3-10°C
C.	10-15°C
D.	Above 15°C
Answer» C. 10-15°C

Discussion

13.	Colour of carrot roots is affected by:
A.	Soil temperature
B.	Soil moisture
C.	Soil texture
D.	All of above
Answer» C. Soil texture

Discussion

14.	Most of following category crops are shallow rooted
A.	Summer
B.	Winter
C.	Off season
D.	All of above
Answer» B. Winter

Discussion

15.	Which of the tree bears red colour flowers?
A.	Erythrena subrosa
B.	Albizia lebbek
C.	Sapium sebiferum
D.	Thuja orientalus
Answer» B. Albizia lebbek

Discussion

16.	A line of demarcation that creates visual interest in a landscape by separating onesegment from another is called
A.	Edging
B.	Border
C.	Fencing
D.	Line
Answer» B. Border

Discussion

17.	Polyembryony means
A.	One embryo
B.	Two embryo
C.	More than two embryo
D.	More than three embryo
Answer» E.

Discussion

18.	Rest is a natural process in
A.	Seed
B.	Seed & plant
C.	Plant
D.	Tropical plant
Answer» C. Plant

Discussion

19.	Leafy vegetables provide
A.	Iron
B.	Carbohydrates
C.	Protein
D.	None of these
Answer» B. Carbohydrates

Discussion

20.	The most common synthetic root-promoting chemicals are:
A.	IBA and AAN
B.	CCA and ACD
C.	ISO and OSB
D.	IBA and NAA
Answer» E.

Discussion

21.	Factors involved in the formation of auxins are:
A.	Age of apex
B.	Light
C.	Zinc
D.	All of the above
Answer» E.

Discussion

22.	Chilling injury in plants occurs at a temperature:
A.	<4°C
B.	<5°C
C.	<8°C
D.	<9°C
Answer» C. <8°C

Discussion

23.	Flowering in water melon is unaffected by light duration as it is:
A.	Short day long night plant
B.	Long day short night plant
C.	Day neutral plant
D.	None of the above
Answer» C. Day neutral plant

Discussion

24.	Following plant(s) is/are propagated through seed.
A.	Murva
B.	Bottle palm
C.	None of above
D.	All above
Answer» E.

Discussion

25.	Parthenocarpic cucumber develops due to:
A.	After pollination
B.	Without pollination
C.	None of above
D.	a & b
Answer» C. None of above

Discussion

26.	Apple flower is distinguished from pear flower:
A.	Due to its colour
B.	Due to its size
C.	a & b
D.	None
Answer» D. None

Discussion

27.	Common rootstocks for apple in Pakistan
A.	M-7
B.	M-9
C.	Crab apple
D.	Sky spur
Answer» D. Sky spur

Discussion

28.	Auxin destruction activity is inhibited by :
A.	Blue light
B.	Red light
C.	Green light
D.	None of the above
Answer» C. Green light

Discussion

29.	When designing an asymmetrical floral arrangement, the floral designer must consider which of the following design principles:
A.	Proportion
B.	Balance
C.	Focal point
D.	All of the above
Answer» E.

Discussion

30.	Apple flower has carpels like
A.	Five
B.	Six
C.	Seven
D.	One
Answer» B. Six

Discussion

31.	Seed production in biennial vegetables is mostly done by:
A.	Seed to seed method
B.	In situ method
C.	Replanting method
D.	All of above
Answer» E.

Discussion

32.	Water availability, temperature extremes, and __________ should be considered whenselecting trees for the landscape.
A.	Slope
B.	Topography
C.	Soil type
D.	Buildings present
Answer» D. Buildings present

Discussion

33.	Light intensity is expressed as:
A.	Foot-candles
B.	Micrometers
C.	Candlelights
D.	All of the above
Answer» B. Micrometers

Discussion

34.	In citrus, 2n chromosome number is
A.	18
B.	22
C.	33
D.	20
Answer» B. 22

Discussion

35.	Excessive soil moisture, late in the season cause.
A.	Decrease in TSS decrease in dry matter
B.	Increase in TSS decrease in dry matter
C.	Decrease in TSS increase in dry matter
D.	None of above
Answer» D. None of above

Discussion

36.	Plants, protein, RNA, DNA contents are increased by
A.	Auxins
B.	Adenine
C.	Cytokinins
D.	None of above
Answer» D. None of above

Discussion

37.	Failure of a viable pollen to grow down the style of the flower of the same variety iscalled ___________:
A.	Self sterility
B.	Self incompatibility
C.	Self unfruitfulness
D.	Sterility
Answer» C. Self unfruitfulness

Discussion

38.	What information is not mentioned in the legend on a final landscape plan?
A.	Plant names
B.	Specific notes concerning installation
C.	Plant quantities
D.	Designer’s name
Answer» E.

Discussion

39.	Molaurty is defined as number of moles of solute per
A.	100 Liters of solution
B.	10 liter of solution
C.	1000 liter of solution
D.	1 liter of solution
Answer» E.

Discussion

40.	Dhaki variety of date palm was originated in:
A.	Sindh
B.	NWFP
C.	Balochistan
D.	Punjab
Answer» C. Balochistan

Discussion

41.	Which of the following vegetable has a dioecious behaviour:
A.	Onion
B.	Cabbage
C.	Bitter gourd
D.	Spinach
Answer» D. Spinach

Discussion

42.	Chilling injury is common in;
A.	Temperate fruits
B.	Tropical and sub-tropical fruits
C.	Deciduous fruits
D.	None of above
Answer» C. Deciduous fruits

Discussion

43.	In Pakistan the postharvest losses of fruits and vegetables ranges between;
A.	10-15%
B.	15-20%
C.	20-30%
D.	20-40%
Answer» E.

Discussion

44.	Most of the cucurbits are:
A.	Salt tolerant
B.	Salt sensitive
C.	a & b
D.	None
Answer» B. Salt sensitive

Discussion

45.	The biggest fruit plant containing family is:
A.	Rosaceae
B.	Citrea
C.	Leguminoseae
D.	Vitaceae
Answer» B. Citrea

Discussion

46.	Which vegetable cannot be grown as an off season vegetable:
A.	Tomato
B.	Potato
C.	Chillies
D.	Cucumber
Answer» C. Chillies

Discussion

47.	Banana plants are infected with:
A.	Banana bunchy top
B.	Anthracnose of stem
C.	Rhizome wilt
D.	None
Answer» B. Anthracnose of stem

Discussion

48.	Staking of vines in rainy season is done to avoid:
A.	Insect attack
B.	Disease attack
C.	Sunscald
D.	None of these
Answer» C. Sunscald

Discussion

49.	Apple belongs to the family
A.	Ancardiaceae
B.	Palmaea
C.	Rutaceae
D.	Rosaceae
Answer» E.

Discussion

50.	Date palm propagation is by means of:
A.	Suckers
B.	Seeds
C.	Off shoots
D.	None
Answer» B. Seeds

Discussion

Explore topic-wise MCQs in Testing Subject.

When used to describe a plant, the word deciduous means that

In spinach, pollination takes place by means of:

Chlorophyll formation takes place within a light wavelength of _________:

A whorl of leaves arising at the base of plants is:

Melons belong to the family

Dormancy is a function of interaction of growth promoter like GA and growth inhibitorlike _________:

Both asphalt and concrete are used for hard surfacing driveways. Which of thefollowing is true for asphalt?

Self pollination is a form of:

According to international standards medicinal plants are those plants which haveactive ingredients in the range of:

Vine of crop of bottle gourd is not staked during:

Which enzyme is involved in ethylene synthesis;

Citrus seeds can be stored with Charcoal at following temperature in dryconditions.

Colour of carrot roots is affected by:

Most of following category crops are shallow rooted

Which of the tree bears red colour flowers?

A line of demarcation that creates visual interest in a landscape by separating onesegment from another is called

Polyembryony means

Rest is a natural process in

Leafy vegetables provide

The most common synthetic root-promoting chemicals are:

Factors involved in the formation of auxins are:

Chilling injury in plants occurs at a temperature:

Flowering in water melon is unaffected by light duration as it is:

Following plant(s) is/are propagated through seed.

Parthenocarpic cucumber develops due to:

Apple flower is distinguished from pear flower:

Common rootstocks for apple in Pakistan

Auxin destruction activity is inhibited by :

When designing an asymmetrical floral arrangement, the floral designer must consider which of the following design principles:

Apple flower has carpels like

Seed production in biennial vegetables is mostly done by:

Water availability, temperature extremes, and __________ should be considered whenselecting trees for the landscape.

Light intensity is expressed as:

In citrus, 2n chromosome number is

Excessive soil moisture, late in the season cause.

Plants, protein, RNA, DNA contents are increased by

Failure of a viable pollen to grow down the style of the flower of the same variety iscalled ___________:

What information is not mentioned in the legend on a final landscape plan?

Molaurty is defined as number of moles of solute per

Dhaki variety of date palm was originated in:

Which of the following vegetable has a dioecious behaviour:

Chilling injury is common in;

In Pakistan the postharvest losses of fruits and vegetables ranges between;

Most of the cucurbits are:

The biggest fruit plant containing family is:

Which vegetable cannot be grown as an off season vegetable:

Banana plants are infected with:

Staking of vines in rainy season is done to avoid:

Apple belongs to the family

Date palm propagation is by means of: