PPSC lecturer Botany Past Paper 2017 for preparation.
Endosperm in gymnosperm is:
A) Diploid
B) Haploid
C) Triploid
D) None of these
Secondary growth occurs by the activity of:
A) Phloem
B) Xylem
C) Cambium
D) Bark
Which of the following is correct for vascular bundle of gymnosperms?
A) Stele
B) Exarch
C) Collateral
D) Conjoint
Pteridophytes are also called:
A) Phanerogams
B) Vascular cryptogams
C) Amphibians of the plant kingdoms
D) Spermatophytes
According to the available fossil record which of the following are the first vascular plants?
A) Horsetails
B) Cycads
C) Lycopsida
D) Psilophytales
Most primitive type of stele found in pteridophytes is:
A) Dicytostele
B) Solenostele
C) Siphonostele
D) Protostele
Mushrooms are classified in which of the following division?
A) Ascomycota
B) Basidiomycota
C) Zygomycota
D) Deuteromycota
A mutualistic association made up of a fungus and a cyanobacterium is called?
A) A saprobe
B) A gamete
C) Lichen
D) Dimorphic
An organism in the Deuteromycota has all the following except ……?
A) Asexual spores
B) Absorptive nutrition
C) Ascospores, basidiospores or zygospores
D) A nucleus
The number of sets of chromosomes in a dikaryotic cell?
A) is greater that diploid cell
B) is lesser than diploid cell
C) is equal to diploid cell
D) None of these
Which of the following is a part of mitosis in the cells of seed plants?
A) Centriole
B) Asters
C) Spindle
D) Cleavage
The sources of hydrogen atom for synthesis of glucose is?
A) H2O
B) NADPH
C) FADH2
D) n(CH2O)
Which of the following colours of light work (s) best for photosynthesis?
A) Green
B) Yellow
C) Blue and red
D) Violet and yellow
In plant cells the dark reaction of photosynthesis take place in the?
A) Cytosol
B) Endoplasmic reticulum
C) Leucoplast
D) Chloroplast
Axillary bud and terminal bud derived from the activity of?
A) Lateral meristem
B) lntercalary meristem
C) Apical meristem
D) Parenchyma
As a tree grows older, which of the following increased more rapidly in thickness?
A) Heart wood
B) Sap wood
C) Phloem
D) Cortex
Bordered pits are found in:
A) Sieve cells
B) Vessel wall
C) Companion cells
D) Sieve tube wall
Karyotaxonomy is based on:
A) Organic evolution
B) Chemotaxonomy
C) Morphological characters
D) Number of chromosomes
Methane is the simplest:
A) Alcohol
B) Hydrocarbon
C) Carbonyl
D) Amine
Antibodies are:
A) Proteins
B) Glycoproteins
C) Carbohydrate
D) Nucleic acid
How many moles of C12H22O12 are needed to prepared OSL a 0.300M solution?
A) 0.750 mole
B) 0.430 mole
C) 8.33 mole
D) 0.15 mole
A plant population that reproduce by self-pollination is an extreme example of?
A) The bottleneck effect
B) The founder effect
C) Rapid gene flow
D) Assortative mating
Most fossils are found in:
A) Sedimentary rocks
B) Granite
C) Black soil
D) Lava flows
Deletions occur most often in chromosomal fragments?
A) Of polytene chromosome
B) With inversion
C) Without centromere
D) With centromere
When two non allelic gene pairs on the same homologous chromosome are each defective but together give a normal phenotype, this is called?
A) Collaboration
B) Complementation
C) Epistasis
D) Modification
How many different kinds of gametes can an organism of genotype AaBbCc produce?
A) 3
B) 4
C) 9
D) 16
Restriction enzymes are synthesized by?
A) Bacteria only
B) Yeast and bacteria
C) Eukaryotic cells
D) All kinds of cells
An operon is the:
A) Protein that suppresses gene expression
B) Protein that accelerate gene expression
C) Gene that switches other genes on or off
D) Cluster of structural genes with related functions
Codon that do not code for amino acids code for?
A) Phosphates
B) Start and stop signals
C) Nonsense
D) Sugars
A polypeptide is assembled on a:
A) DNA molecule
B) Nuclear membrane
C) Nuclear pore
D) Ribosome
Fungi that lack partitions (septa) are called?
A) A hyphae
B) Coenocytic
C) Yeast
D) Conidia
The endomycorrhizas are also called as?
A) Hartwig nets
B) Mat forming mycorrhizas
C) Vesicular Arbuscular Mycorrhiza (VAM)
D) intracellular mycorrhizas
Pseudofoot is present in:
A) Funana
B) Polytrichum
C) Porella
D) Anthoceros
Protonema is found in:
A) Marchantia
B) Polytrichum
C) Porella
D) Anthoceros
Which plant does belong to Hepaticopsida?
A) Funaria
B) Polytrichum
C) Porella
D) Anthoceros
The basal swollen portion of the archegonium is?
A) Venter
B) Neck
C) Jacket
D) Oospere
Which of the following algal divisions is characterized by possession of chlorophylls A and B. starch as the energy storage material, cellulosic cell walls and live in freshwater and marine habitats?
A) Chlorophyta
B) Chrysophyta
C) Phaeophyta
D) Pyrrophyta
Which are the most primitive group of algae?
A) Blue green algae
B) Red algae
C) Brown algae
D) Green algae
Members of biological species are potentially able to?
A) Compete
B) Express all the same genes
C) Introgress
D) Interbreed
A lethal gene has a selection coefficient of:
A) 0
B) 0.50
C) 1.00
D) 100