Phenomenon by which living or dead plant cells absorb water by surface attraction:
1.Transpiration
2.Osmosis
3.Adhesion
4.Imbibition
Posted Date:-2022-01-13 01:22:34
__________Bonds are present between the complementary nitrogenous bases of DNA
1.Nitrogen
2.Hydrogen
3.Coordinate
4.ionic
Posted Date:-2022-01-13 01:40:22
A cell organelle directly involved in genetics:
1.Cytoplasm
2.Nucleus
3.Chloroplast
4.Chromosomes
Posted Date:-2022-01-13 01:23:38
A genotype can be described as :
1.The genetic makeup of an organism
2.Part of a chromosome that codes for a certain hereditary trait.
3.The outward, visibie expression of the hereditary makeup of an organism.
4.The shifting of gene positions in chromiosómes
Posted Date:-2022-01-13 01:51:31
At what stage, chromosomes line up at the equator?
1.Prophase
2.Anaphase
3.Telophase
4.Metaphase
Posted Date:-2022-01-13 08:37:13
Bacteria cannot survive in a highly salted pickle because:
1.Salt inhibits reproduction
2.No favorable environment that lead to bacteria dead
3.Bacteria do not get enough light for photosynthesis
4.Bacteria plasmolyse and consequently kills
Posted Date:-2022-01-13 01:48:02
Bleeding
1.Escape of water loses through hydathodes of plant
2.Exudation of water from margins of leaves
3.Oozing out of water drops from injured edges or tips
4.Water loses through stomata, lenticels and cuticles
Posted Date:-2022-01-13 06:47:50
Centromere
1.Within a chromosome consisting of DNA and uncondensed protein
2.Point of attachment of two chromatid sisters
3.Star-shaped structures from around each pair of centriology
4.DNA-protein complex in nucleus
Posted Date:-2022-01-13 07:01:02
Chloroplast and Photosynthesis: Xylem and.____________
1.Food Food transportation
2.Gaseous exchange
3.Water and minerals transportation
4.Transpiration
Posted Date:-2022-01-13 08:56:03
Choose the correct explanation for the results Phloem is removed and Xylem is intact in Plant A Xylem is removed and Phloem is intact in Plant A Phloem is intact and Xylem is removed in Plant B V. Xylem is removed and Phloem is intact in Plant A
1.I and II
2.Only II
3. I and III
4.All of these
Posted Date:-2022-01-13 08:54:29
Chromatids
1.provide hereditary characteristics and genetic information
2.control the inheritance of all characteristics except the sex-linked ones
3.organize the microtubules and provide a structure to the cell
4.allow cells to store two copies of their information in cell division
Posted Date:-2022-01-13 07:59:42
Cobalt chloride paper will turn_____________ faster due to presence of more stomata at dorsals surface
1.blue
2.blue black
3.colourless
4.pink
Posted Date:-2022-01-13 01:30:28
Cristae
1.Individual flattened stacks of membranous structures inside the chloroplasts
2.At the tip and margins of leaves
3.Fluid in the chloroplast
4.Green pigment in the chloroplast of the green leaves
Posted Date:-2022-01-13 06:58:17
Cuticle
1.Absorb sunlight for the photosynthesis
2.Wax-like layer on the epidermis of leaves to reduce transpiration
3.Provide an increase in the Surface area
4.Contain enzymes required for photosynthesis as well as EDNA, RNA
Posted Date:-2022-01-13 08:03:40
DNA
1.Uncondensed form of nucleoprotein
2.Single stranded molecule having short chain of nucleotides
3.Double stranded molecule having long chain of nucleotides
4.Condensed form of nucleoprotein
Posted Date:-2022-01-13 01:54:24
Equipment used to determine the rate of transpiration in plants:
1.Potometer
2.Photometer
3.Auxanometer
4.None of these
Posted Date:-2022-01-13 01:17:57
Guard cells
1.Absorption of light energy and conversion of it into biological energy
2.Regulate the opening and closing to stomata
3.Prevents evaporation to water for the epidermis surface
4.Provide the platform for the light Reaction
Posted Date:-2022-01-13 08:05:59
How many chromosomes will each daughter cell have after the completion of the above division?
1.2
2.4
3.6
4.8
Posted Date:-2022-01-13 08:44:50
In which stage of the cell cycle will RNA polymerase enzyme be most active
1.M phase
2.G2 phase
3.S phase
4.Quiescent phase
Posted Date:-2022-01-13 01:50:34
Law of segregation
1.Out of a pair of contrasting characters present together, only one form of the trait will appear if the next generation
2.Two members of a pair of factors separate during gamete formation
3.Distribution of alleles of one character into the gametes is independent of the distribution of the allele of the other characters
4.In a pair of contrasting characters, prominently recessive trait will appear in next generation
Posted Date:-2022-01-13 06:46:23
Lenticels
1.Present in the epidemies to the stems woody plants
2.Loose aggregation of cells in the bark of the
3.Margins of the leaves of herbaceous plants
4.Both 1and 2
Posted Date:-2022-01-13 07:54:30
Light reaction: Granum:: Dark reaction ______________.
1.Stoma
2.Mesophyll cells
3.Thylakoids
4.Grana
Posted Date:-2022-01-13 01:32:30
Mineral salts are absorbed by roots from the soil in the form of:
1.Very dilute solution
2.Concentrated solution
3.Hypertonic solution
4.Very concentrated solution
Posted Date:-2022-01-13 09:01:07
NADP is expanded as__________.
1.Nicotinamide Adenosine Dinucleotide Phosphate
2.Nicotinamide Adenine Dinucleotide Phosphate
3.Nicotinamide Adenosine Dinucleous Phosphate
4.Nicotinamide Adenine Dinucleous Phosphate
Posted Date:-2022-01-13 01:27:03
Nucleotides
1.Storage and transfer of genetic information
2.Cell division and Protean synthesis
3.Cell signaling, metabolism and enzyme reactions
4.All of these
Posted Date:-2022-01-13 08:26:14
Phloem
1.outer side of the vascular bundle
2.centre of the vascular bundle deep in the plan
3.between the vascular tissues and the' epidermis
4.between the two primary cell walls of two plante
Posted Date:-2022-01-13 07:04:08
Photolysis
1.Conversion of glucose into starch
2.Conversion of light energy into chemical energy
3.Splitting of water molecule into hydrogen and oxygen ions in the presence to light
4.Conversion of ADP into ATP in the presence of light
Posted Date:-2022-01-13 06:52:08
Root pressure is maximum when:
1.Transpiration is high
2.Absorption is low
3.Transpiration is very low and absorption is very high
4.Both transpiration and absorption are very high or low
Posted Date:-2022-01-13 08:57:17
Some adaptations found in plants to reduce the rate of transpiration:
1.Sunken stomata
2.Modification of leaves into spines.
3.Presence of thick layer of cuticle on the leaf surface
4.All of these
Posted Date:-2022-01-13 01:46:46
Stroma
1.Sites of dark reaction of photosyntinesis
2.Site of light independent phase of photosynthesis
3.Site of light reaction of photosynthesis
4.Both1 and 2
Posted Date:-2022-01-13 08:00:20
The cell sap of root hair is _______________.
1.isotonic
2.hypotonic
3.hypertonic
4.None of these
Posted Date:-2022-01-13 01:35:17
The cross between two parents having one pair of ocontrasting characters.
1. Dihybrid Cross
2.Monohybrid Cross
3.Back Cross
4.Test Cross
Posted Date:-2022-01-13 01:21:09
The material used to dissolve the chlorophyll pigments while testing a leaf for starch:
1.Cobalt chloride paper
2.Litmus Paper
3.Boiled water
4.Methylated spirit
Posted Date:-2022-01-13 01:19:30
The plants die due to wilting because :
1.available light is reduced to half
2.xylem is blocked
3.a few roots are broken
4.phloem is blocked
Posted Date:-2022-01-13 09:01:59
Thymine
1.Phosphate in DNA paired with sugar
2.Nitrogenous base in DNA paired with adenine
3.Pentose in RNA
4.Pentose in DNA
Posted Date:-2022-01-13 07:55:51
Turgor pressure
1.Pressure exerted by cell wall on cell sap
2.Minimum pressure exerted lo prevent the passage ot pure solvent into the solution
3.Pressure of water against the inside cell wall of a plant cell
4.Pressure to raise water up through the stem into leaves
Posted Date:-2022-01-13 01:57:21
Which of the following is not the phase of light reaction?
1.Water splitting
2.Oxygen release
3.Carbon dioxide release
4.Light absorption
Posted Date:-2022-01-13 01:49:13
Which of the following occurs only in meiosis, not in mitosis?
1. Separation of duplicated DNA
2.Pairing of homologous chromosomes
3.Cytokinesis
4.Disappearance of nuclear membrane
Posted Date:-2022-01-13 08:40:38
Which of the following option is correctly labelled for the stages of mitosis?
1.1-Centromere, 2-Spindle fibres, 3-Chromatids, 4-Centriole
2.1-Centriole, 2-Spindle fibres, 3-Centromere, 4-Chromosomes
3.1-Centriole, 2-Spindle fibres, 3-Chromatids, 4-Centromere .
4.1-Centriole, 2-Centromere, 3-Spindle fibres, 4-Chromosomes
Posted Date:-2022-01-13 08:28:44
Which stage is being shown in figure (a) ?
1.Prophase
2.Anaphase
3.Telophase
4.Metaphase
Posted Date:-2022-01-13 08:30:03