1601. Surface temperature of sun is___________________?
comments icon0

A. 2000C

B. 100,000C

C. 500C

D. 6000C

1602. Chemically DNA differs from RNA by __________________?
comments icon0
A. Deoxyribose and thymine is present in DNA and ribose and Ural in RNA

B. Ribose and thymine in DNA and deoxyribose and uracil in RNA

C. Deoxyribose in DNA and ribose in RNA

D. Thymine present in DNA and Uralic in RNA

1603. A reproductive part of the plant which is responsible for the production of fruits and seeds is called ________________?
comments icon0

A. All the above

B. Flower

C. Corolla

D. Calyx

1604. How much area in Pakistan is under horticultural crops ___________________?
comments icon0

A. 25%

B. 3%

C. 6%

D. 10%

1605. When red tall plant is crossed with dwarf white plant all the plants of F, are found to be tall red. which of the following ratio will be available when a test cross is made_________________?
comments icon0

A. 3:01

B. 1:02:01

C. 1:1:1:1

D. 1:02:03

1606. A branch of horticulture dealing with the production and marketing of vegetable is called__________________?
comments icon0

A. Viticulture

B. Pomology

C. Sericulture

D. Olericulture
1607. Eugenics refers to__________________?
comments icon0

A. Experimental alterations in the structure of the genes

B. Science concerned with improvement of heredity of human race

C. Genetics of eukaryotes

D. Science concerned with improvement of heredity of animals

1608. Which of the cell organelle is considered to be rich in catabolic enzymes_____________________?
comments icon0
A. Mitochondria

B. Lysosome

C. Golgi bodies

D. Endoplasmic reticulum

1609. The term gene was coined by__________________?
comments icon0

A. Punned

B. Darlington

C. Batson

D. Johnnsen

1610. A cross of unlike organisms is termed as____________________?
comments icon0
A. Hybrid

B. Backcross

C. None of the above

D. Heterosis

1611. Breeder seed is the progeny of__________________?
comments icon0
A. Nucleus seed

B. Cenified seed

C. Foundation

D. Registered seed

1612. Formation of male and female gametes in the flower is called__________________?
comments icon0

A. REproduction

B. Zygote formation

C. Gametogenesis

D. Fertilization

1613. An individual with two identical members of a part of geneue factors is called__________________?
comments icon0

A. Hybrid

B. Homozygous

C. Heterozygous

D. Dominant

1614. The suppression of the action of a gene or genes by a gene or genes not allelomorphic to these suppressed is known as __________________?
comments icon0
A. Epistasis

B. Episode

C. Co dominance

D. Dominance

1615. Which is the suitable perennial grass for lean periods__________________?
comments icon0

A. Marvel

B. Para

C. Napier

D. Anjan

1616. Male sterility in flowering plant was first reported by___________________?
comments icon0

A. Brewbaker (1810)

B. Stout (1917)

C. Gerstel (1900)

D. Koelreuter (1763)
1617. Maize has 10 pairs of chromosomes. how many linkage groups will be present if all the genes are mapped__________________?
comments icon0
A. 10

B. 15

C. 40

D. 20

1618. Calyx and corolla together are called__________________?
comments icon0

A. Petals

B. Epidermus

C. Sepals

D. Perianth
1619. According to national commission of Pakistan, post harvest losses in fruits are____________________?
comments icon0

A. 30-50%

B. 20-25%

C. 20-40%

D. 60-70%

1620. A mutant organism (bacterium) that will not grow on a minimal medium does so on the addition of some grown factor is known as __________________?
comments icon0

A. Auxotroph

B. Axenema

C. Autotrophy

D. Heterotroph

1621. The physical appearance of an organism is denoted by____________________?
comments icon0

A. Apheliotropic

B. Prototype

C. Photocopy

D. Phenotype
1622. If a plant is heterozygousand is designated (BbMm)and produces two kinds of gametes either (BM)or (bm), then the possibility of (bm) gametes fertilizing either (BM) or (bm) is_________________?
comments icon0

A. 4-Jan

B. 0/1

C. Half

D. 1-Jan

1623. An atmosphere with reduced concentration of O2 and increased concentration of CO2 is called_______________?
comments icon0

A. Refrigeration

B. Humidity control

C. Controlled atmosphere

D. Oxidation

1624. Abnormal cell with random number of chromosomes is__________________?
comments icon0

A. Polyploidy

B. Heterckaryotic

C. Annapolis

D. Haploid

1625. If the leaf cells have eight chromosomes it is mostly likely that__________________?
comments icon0

A. Gametes will have 8 chromosomes

B. Zygote will have 4 chromosomes

C. Gametes will have 4 chromosomes

D. Zygote will have 16 chromosomes

1626. Several scions with their base ends trimmed as wedges are inserted between the bark and the wood is called_________________?
comments icon0

A. Tongue grafting

B. Bark grafting

C. Splice grafting

D. Bridge grafting

1627. Citrus tree can tolerate soil pH_________________?
comments icon0

A. None of the above

B. 5.5-7.5

C. 5.5-8.5

D. 6-May

1628. Electron microscope was invented by _________________?
comments icon0
A. Knoll and Risks

B. Sigmund

C. Schwaan

D. Robert Hook

1629. Which of the following is not a fruit____________________?
comments icon0

A. Muskmelon

B. Potato

C. Bitter gourd

D. Tomato

1630. In mango and carrot how much vitamin C (mg/100 gm)is present__________________?
comments icon0

A. None of the above

B. 80

C. 40

D. 30
1631. In random mating population gene frequencies remain constant generation after generation in the absence of__________________?
comments icon0

A. Random drift

B. Selection

C. Migration

D. Mutation

1632. What type of pollination is observed in cauliflower__________________?
comments icon0

A. Self pollination

B. Cross pollination

C. Self fertilization

D. Partial self fertilization

1633. The number of calories of heat required to change the temperature of one Kg of a substance is called____________________?
comments icon0

A. Heat action

B. Specified heat

C. None of the above

D. Molar heat

1634. The basal part which provided the root system for anchorage and absorption of moisture and nutrients is called___________________?
comments icon0

A. Grafting

B. Scion

C. Budding

D. Root stock
1635. In Holy Quran which one of the following fruits have been especially mentioned____________________?
comments icon0
A. All the above

B. Figs

C. Dates

D. Grapes

1636. Continuous variation are attrions are attributed to____________________?
comments icon0

A. Mutations

B. Polyploidy

C. Crossingover

D. Linkage

1637. Parthenogenesis is most commonly seen in___________________?
comments icon0

A. Apple

B. Grape

C. Orange

D. Mango

1638. If the cell of an organism (heterozygous) for two pairs of genes represented by Aa, Bb, undergoes meiosis then the possible genotype of gametes are________________?
comments icon0

A. AB, ab

B. Data insufficient

C. Ab, ab

D. AB, Ab, aB, ab
1639. How many training system are__________________?
comments icon0

A. Two

B. Five

C. Four

D. Three
1640. Fruit in which edible portion is thalamus are known as___________________?
comments icon0

A. Aggregate fruit

B. Pome

C. Soft fruits

D. Berries

1641. Which one of the following is not found in DNA__________________?
comments icon0

A. Thymine

B. Guanine

C. Uracil

D. Cystine

1642. The chief function of the centro mere concerns___________________?
comments icon0
A. Chromosome movement

B. Chromosome replication

C. Spindle formation

D. Nucleolus formation

1643. Cleft grafting is most successful in_________________?
comments icon0

A. Almond

B. Apple

C. Both a & b

D. None of the above

1644. Cabbage and cauliflower are also___________________?
comments icon0

A. Leafy vegetables

B. Cole crop

C. Solanaceous

D. Bulb crop

1645. Direct effect of pollen grains on the female tissues of the ovary is called__________________?
comments icon0

A. Xenia

B. Metaxenia

C. Pollination

D. None of the above

1646. What type of pollination is observed in cucumber_____________________?
comments icon0
A. Partially cross pollination

B. Self pollination

C. Partially self fertilization

D. Cross pollination

1647. Diagrammatic representation of the chromosomes of an organism arranged according to their size is called_____________________?
comments icon0

A. Gene map

B. Karyotype

C. Ideogram

D. Phenotype

1648. In day time plants release_________________?
comments icon0
A. Oxygen

B. Carbon dioxide

C. Hydrogen

D. Nitrogen

1649. The main function of auxin is_____________________?
comments icon0

A. Cell division

B. Cell production

C. Cell differentiation

D. Cell elongation
1650. Cabbage, cauliflower, broccoli, knol-knol are_____________________?
comments icon0

A. Solanaceous vegetables

B. Cole crop

C. Leafy vegetables

D. Floral vegetable