During Anaphase of mitosis , the position of the arms of chromatids are:
1.Towards the equator of the cell
2.Towards the poles of the cell
3.Varies from cell to cell
4.At any place in the cell
Posted Date:-2022-01-13 07:49:58
Genetics is the study of _____________.
1.development of organism
2.mechanism of inheritance
3.nuclear division
4.variation between species
Posted Date:-2022-01-13 06:24:01
Identify the figure (ii).
1.Flaccid cell
2.Turgid cell
3.Plasmolysed cell
4.None of these
Posted Date:-2022-01-13 07:55:08
In which stage of cell division chromosome gets attached to spindle by its centromere?
1. Anaphase
2.Prophase
3.Metaphase
4.Telophase
Posted Date:-2022-01-13 07:47:57
When an individual has both the genes of a contrasting character, it is said to be
1.Homozygous
2.Heterozygu
3.Phenotype
4.Genotype
Posted Date:-2022-01-13 06:13:18
Xylem Tissue
1.Transport sugars, proteins, and other organic molecules in plants.
2.Transport of water and dissolved ions from the roots upwards through the plant
3.Fibers provide support
4. Both 1 and 2
Posted Date:-2022-01-13 07:10:17
A normal human body contains ____________ group of chromosomes and the number of sex chromosomes in a sex cell of a being is ______________.
1.44, 22
2.23,2
3.23, 22
4.46,2
Posted Date:-2022-01-13 06:27:12
Alleles
1.Alternate forms of genes
2.Linked genes
3.Chromosomes that have crossed over
4. Homologous chromosomes
Posted Date:-2022-01-13 06:51:26
Cho0se the correct numbering given to different cell division stages of mitosis
1.B-Metaphase, C-Early anaphase
2.A- Metaphase, B- Metaphase
3.A-Prophase, C-Early anaphase
4. Both 4 and 3
Posted Date:-2022-01-13 07:23:43
Chromatin
1.A substance within a chromosome consisting of DNA and uncondensed protein.
2.A long DNA molecule with part or all of the genetic material of an organism.
3.A double helix, composed of repeating nucleotides join to other strands via hydrogen bonds.
4.The point of attachment of two chromatid sisters.
Posted Date:-2022-01-13 06:55:11
Damage and errors in DNA cause _________________ .
1.mutation
2.DNA repair
3.translation
4.transcriotion
Posted Date:-2022-01-13 06:28:56
DNA threads which appear inside the nucleus during cell division
1.Spindle fibers
2.Centriols
3.Asters
4.Chromosomes
Posted Date:-2022-01-13 06:11:59
During photosynthesis, energy, absorbed from sunlight is stored as chemical energy in biomolecules.
1.ATP ADP
2.ATP,NADPH
3.NAD,NADP
4.NADH2,ATP
Posted Date:-2022-01-13 06:31:32
Epiblema
1.The central part of a plant root
2.Outermost layer of protective cells in a root
3.Extensions of the roots arising from the epidermis
4.A separation between the xylem and phloem
Posted Date:-2022-01-13 07:03:56
Histones
1.Proteins that help in coiling and packaging of RNA into nucleosomes
2.Encode particular proteins which express in the form of a trait
3.Proteins that help in coiling and packaging of DNA Into nucleosomes.
4.Help in sex determination.
Posted Date:-2022-01-13 07:13:52
Hydathodes
1.Epidermis of leaf, young stem and floral parts
2.Margins of leaf where the vascular supply ends
3.Adaxial or abaxial surfaces of leaves
4.Both 2 and 3
Posted Date:-2022-01-13 07:04:52
Identify the figure (i)
1.Flaccid cell
2.Turgid cell
3. Plasmolysed cell
4.None of these
Posted Date:-2022-01-13 07:53:54
Lenticels
1.Permit the entrance of oxygen from the plants
2.Permit the output of carbon dioxide and water vapor in the plants
3.Promote gas exchange of oxygen, carbon dioxide and water vapor
4.All of the above
Posted Date:-2022-01-13 07:14:47
Marine fish when placed in tap water bursts because of:
1.Endosmosis
2.Exosmosis
3.Diffusion
4.Plasmolysis
Posted Date:-2022-01-13 07:57:10
Mesophyll cells
1.Located above the upper epidermis
2.Located between the upper and lower epidermis
3.Located below the lower epidermis
4.Located above the upper and below the lower epidermis
Posted Date:-2022-01-13 07:06:15
Mitosis produces ______________daughter cells and meiosis produces____________daughter cells .
1. 2,2
2.2,4
3.4, 2
4.4,4
Posted Date:-2022-01-13 06:20:35
Osmosis
1.Movement of solute molecules through a semi-permeable membrane from region of their higher concentration to the lower concentration region.
2.Movement of solvent molecules through a semi-permeable membrane from region of their higher concentration to the lower concentration region.
3. Movement of solvent molecules through a semi-permeable membrane from region of the. lower concentration to the higher concentration region.
4.Movement of solute molecules through a semi-permeable membrane from region of their lower concentration to the higher concentration region.
Posted Date:-2022-01-13 06:53:01
Osmotic pressure
1.Maximum pressure exerted to prevent the passage of pure solvent into the solution separated by a semi permeable membrane.
2.Minimum pressure exerted to prevent the passage of pure solvent into the solution separated by a semi permeable membrane.
3.Minimum pressure exerted to prevent the passage of pure solute into the solution separated by a semi permeable membrane.
4.Maximum pressure exerted to prevent the passage of pure solute into the solution separated by a semi permeable membrane
Posted Date:-2022-01-13 06:59:51
Phenomena responsible for rupturing coats of germinating seeds
1.Osmosis
2.Diffusion
3.Assimilation
4.Imbibition
Posted Date:-2022-01-13 06:17:40
Phenomena responsible for rupturing coats of germinating seeds
1.Osmosis
2.Diffusion
3.Assimilation
4.Imbibition
Posted Date:-2022-01-13 06:18:02
Phosphorylation
1.Addition of phosphate to NADP to form NADPH.
2.Addition of phosphate to adenosine diphosphate (ADP) to form adenosine triphosphate (ATP)
3.Removal of phosphate from adenosine triphosphate (ATP) to form adenosine diphosphate (ADP)
4.Removal of phosphate from NADP to form NADPH
Posted Date:-2022-01-13 06:56:35
Rate of transpiration increases with:
1.Intensity of sunlight, high atmospheric CO level. high water content
2.Closure of stomata, high atmospheric CO level, velocity of wind
3. Intensity of sunlight, dry air, high water content
4.Opening of stomata, high atmospheric CO level, shedding of leaves
Posted Date:-2022-01-13 06:40:35
Root hair
1.Extension of metaxylem
2.Extension of epidermis
3.Extension of cortex
4.Extension of pith
Posted Date:-2022-01-13 07:07:57
Stomata
1.Transpiration and translocation
2. Exchange of gases and excretion
3.Transpiration and exchange of gases
4.Photosynthesis and translocation
Posted Date:-2022-01-13 07:16:33
Synapsis
1.Pairing of acentric chromosomes during mitosis
2.Pairing of non-homologous chromosomes during meiosis
3.Pairing of any chromosomes during mitosis
4.Pairing of homologous chromdsomes during meiosis
Posted Date:-2022-01-13 07:19:49
The condensation of chromosomes IS observed in _____________.
1.Prophase I
2.Anaphase
3.Metaphase
4.None of these
Posted Date:-2022-01-13 07:40:02
The leaves of certain plants exhibit droplets of water along their margin in the warm humid conditions.
1.Bleeding
2.Guttation
3.Transpiration
4.Evaporation
Posted Date:-2022-01-13 06:15:15
The plants die due to wilting when:
1.Available light is reduced to half
2. Xylem is blocked
3.Few roots are broken
4.Phloem is blocked
Posted Date:-2022-01-13 06:41:45
The process of conversion of ADP into ATP during photosynthesis
1.Photolysis
2.Polymerization
3.Photophosphorylation
4.None of these
Posted Date:-2022-01-13 06:16:14
The sequence of cell cycle is
1. S, MG and G
2.GSG and M
3.G G S and M
4.MG G and S
Posted Date:-2022-01-13 06:39:17
Thylakoids
1.In the fret of chloroplast
2.Wall of the chloroplast
3.In the chlorophyll
4.In the stroma of the chloroplast
Posted Date:-2022-01-13 07:03:00
Water regulation within the plant cell occurs through the process:
1.Osmosis
2.Diffusion
3.Active transport
4.Transpiration
Posted Date:-2022-01-13 07:56:01
Which of the following is the logical sequence for the root showing the cell to cell conduction of water?
1.Root hair ------> Endodermis-----> Soil water------> Xylem ------>Cortex
2.Xylem------> Cortex -------->Endodermis------> Root hair------> Soil water
3.Soil water----------> Root hairs-----------.Cortex ------------>Endodermis Xylem
4.Cortex ----------->Endodermis ------------->Xvlem----------> Root hair Soil water
Posted Date:-2022-01-13 06:48:04
Which of the statements define Cytokinesis?
1.A division of cytoplasm
2.All nuclear changes during cell division
3.Cleavage furrow deepen totally in animal cell
4. All of these
Posted Date:-2022-01-13 07:49:10