Archive for the ‘Botany Solved MCQs’ Category

Botany Physiology and Ecology MCQs Past Questions Objective Papers

Botany Physiology and Ecology MCQs Past Questions Objective Papers

Q. 1. Fill in the blanks
Please fill in the blanks with appropriate terms/words
i. Temporary stage of decreased metabolism and growth rate is called ————————.
ii. A condition during which layers of soil are permanently saturated is called —————-.
iii. ———————–and ——————— of soil surface by any physical agency is known
as erosion.
iv. Breakdown of any ———————————- material is respiration.
v. —————————— cells are functionally associated with the sieve elements of
phloem in angiosperms.
vi. The enzymes are often referred to as biological ——————————–.
vii. Growth / flowering response of plants to low temperature treatment is called ——————————————.
viii. First stable product of photosynthesis in C3 plants is —————————.
ix. The plant cells shrink due to——————————- in hypertonic environment.
x. Activities in plants are regulated by —————————–.
xi. —————————- are ultimate parent material for soil.
xii. Total biomass in autotrophs is ———————– productivity.
xiii. Plant and animals constitute the ———————– component of ecosystem.
xiv. The part of species confined in certain area makes up its——————-.
xv. Murree hills are occupied by the plants predominantly belonging to ———————–.
xvi. Enzymes do affect reaction rate, what they do not affect is ——————————-.
Q. 2. True or False statements
Please select true or false statement by encircling ‘T’ or ‘F’ as appropriate
vii. Growth movements involve gain or loss of water in pulvinus. T F
viii. Mg and Fe both are used to synthesize the phytal tail in chlorophyll. T F
ix. Loss of water from the surface of plant is transpiration. T F
x. Wind as a factor, causes splash erosion. T F
xi. Disintegration of rocks by plants is physical weathering. T F
xii. Alkaline sodic soils predominantly contain potassium, aluminum
and sodium. T F
Q. 3. Multiple Choice Questions
Please encircle the appropriate letter (a, b, c or d) of the correct answer.
vii) The study of a single population and its interaction with the environment is called
e) Ecology
f) Autecology
g) Synecology
h) lithology
viii) In a food chain, the amount of energy, from the base to the top always
e) increases
f) decreases
g) varies
h) remains the same
ix) The species at the verge of extinction are
e) Endangered
f) Threatened
g) Extinct
h) Extant
x) The only living cells in xylem are
e) Parenchyma
f) Vessels
g) Tracheids
h) Fibers
xi) Inside the plant body water always moves via —————– pathway
e) Apoplast
f) Symplast
g) Vacuolar
h) a, b, and c are correct
xii) The pigment involved in photoperiodism is
e) Cytochromes
f) Carotenoids
g) Phytochromes
h) Chlorophylls

Botany Cell Biology Genetics and Evolution MCQs Objective Papers

Q. 1. Fill in the blanks
Please fill in the blanks with appropriate terms/words
i.   ___________can take place in haploid and in diploid cells in all parts of the body.
ii.   A condition in which the organisms have more than complete sets of chromosomes is called____________.
iii.   The study of transfer of hereditary characters from parent to offspring is called______________.
iv.   A gamete without any sex chromosome is called _____________ gamete.
v.  Linked genes can be separated by _____________.
vi.  RNA polymerase can initiate transcription at specific DNA sequence called_____________.
vii.  All the chemical reactions taking place within a cell are collectively called_____________.
viii.  The covalent bond between two monosaccharides  is called______________.
ix.   Acylglycerols are composed of glycerol and_____________.
x.  Transfer of genetic material from one bacterium to another is called_____________.
xi.  Recombinant DNA is introduced into the host cell by means of a_____________.
xii.  Glyoxisomes are most abundant in plant _____________ storage tissues.
xiii.  The preservation of gene pool is called_____________.
xiv.  _____________ is the part of the gene that will become a part of final mature RNA.
xv.  _____________reduces the chances of genetic recombination and variations among
offspring.
xvi.  The double helical structure was first discovered by_____________.
Q. 2. True or False statements

i.     Chloroplast and mitochondria do not have hereditary material.  T  F
ii.     The nuclear membrane is actually a nuclear envelope composed of three membranes.T  F
iii.     Genes are the units of inheritance.  T  F
iv.     The position of gene on the chromosome is called its locus.  T  F
v.    The cross in which one trait is followed at a time is called dihybrid cross.T  F
vi.    Random mating occurs in natural populations.   T  F
Q. 3. Multiple Choice Questions
i. Nucleic acids are polymers of units called:
a. Nucleotides
b. Fatty acids
c. Amino acids
d. Isoprenoid units
ii. A cell consists of three major components which are nucleus, cytoplasm and:
a. Mitochondria
b. Cell plasma membrane
c. Protoplast
d. Chloroplast
iii. Translocation  is an example of:
a. Chromosomal structural aberrations
b. Point mutation
c. Transcription
d. Polysome
iv. Mendel’s hereditary  factors have been given the name of:
a. Units
b. Elementens
c. Genes
d. Representatives
v. Green colour blindness is called:
a. Protanopia
b. Deuteranopia
c. Greenopia
d.Tritanopia
vi. Which of the following are nonsense codons?
a. UAA, UAG, UGA
b. UAA, UCU, ACA
c. CUA, UUA, UUG
d. AUG, AUA, AUU

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