_______ is concerned with cell secretions
1.Endoplasmic reticulum
2.Golgi complex
3.Lysosomes
4.Cell membrane
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_______ is the potential surce of chemical energy for cellular activities
1.C-H bond
2.C-O bond
3.C-N bond
4.P-O-C bond
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A cell of human being has 46 chromosomes; it divides to form some daughter cells, each having 23 pairs of chromosomes. The division would be
1.Mitosis
2.Meiosis
3.Amitosis
4.Budding
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A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called
1.Substrate
2.Co-factor
3.Inhibitor
4.Promotor
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A significant happening of meiosis is / are
1.Crossing over
2.Random assortment
3.Both of these
4.None of these
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A special area of centromere with specific base arrangement and specific proteins where spindle fibers are attached is called
1.Chromatin
2.Aster
3.Kinetochore
4.Primary constriction
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Apoptosis
1.Cell death due to tissue damage
2.Causes inflammation
3.Internal programme of events by which cell commits suicide
4.Damages neighboring cells
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Bacteria which grow either in the presence or absence of oxygen
1.Aerobic bacteria
2.Anaerobic bacteria
3.Facultative bacteria
4.Microaerophilic
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Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called
1.Molecular biology
2.Physiology
3.Biochemistry
4.Atomic biology
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Breakdown of large molecules into smaller ones utilizing water molecules is
1.Hydration
2.Hydrolysis
3.Dehydration synthesis
4.Electrolysis
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Cancer cells are
1.Differentiated
2.Undifferentiated
3.Highly differentiated
4.Less differentiated
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Control of organisms by using living organisms is called
1.Bioremediation
2.Integrated disease management
3.Antisepsis
4.Biological control
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Crossing over in meiosis occurs during
1.Zygotene
2.Pachytene
3.Dislotene
4.Diakinesis
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Crossing over occurs between
1.Sister chromatids
2.Non sister chromatids
3.Independent chromatids
4.Each and every chromatid
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Cytokinins refers to
1.Division of nucleus
2.Division of cytoplasm
3.Division of cell
4.All of these
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Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of
1.Microtubules
2.Microfilaments
3.Intermediate filaments
4.None of these
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Each bivalent has
1.3 chromatids
2.4 chromatids
3.5 chromatids
4.2 chromatids
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Each kinetochore gets ________ fibers in mitosis
1.5
2.4
3.3
4.2
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Feature of cancer cells in common?
1.High nucleus to cytoplasmic ratio
2.Prominent nucleoli
3.Many mitosis
4.All of these
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From each pair of centrioles ________ sets of microtubules originate
1.2
2.3
3.4
4.5
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Homologous chromosomes are
1.Similar and identical
2.Identical but not similar
3.Not similar and not identical
4.Similar but not identical
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In plants mitotic apparatus consists of
1.Centriole
2.Centriole and asters
3.Centrioles, asters and spindles
4.Spindles only
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Inability of chromosomes to segregate during anaphase and telophase of meiosis is called
1.Crossing over
2.Chromosomal disjunction
3.Chromosomal nondisjunction
4.None of these
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Intake of liquid material by cell membrane is called
1.Endocytosis
2.Exocytosis
3.Phagocytosis
4.Pinocytosis
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Interphase of meiosis lacks
1.G0 phase
2.G1 phase
3.G2 phase
4.S phase
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Meiosis occur in
1.Diploid cells only
2.Haploid cells only
3.Both diploid and haploid cells
4.Monoploid cells only
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Meiosis occurs at the time of
1.Gamete formation in animals
2.Spore formattion in plants
3.Growth in animals
4.Both a and b
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Microtubules are composed of
1.Action protein
2.Actin and myosin proteins
3.Sphingomyelin and tubulin
4.Tubulin protein and traces of RNA
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Mitosis takes place during
1.Healing of wound
2.Development and growth
3.Vegetative propagation
4.All of these
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Mitotic apparatus in animals is formed by
1.Aster and spindle
2.Polar and kinetochore microtubules
3.Spindle and RNA
4.Spindle only
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Morphology of chromosomes is best studied during
1.Telophase
2.Metaphase
3.Prophase
4.All of these
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Most critical phase of mitosis is
1.Prophase
2.Anaphase
3.Metaphase
4.Telophase
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Out of total organisms on earth, ______ are vascular plants
1.53.10%
2.19.90%
3.17.60%
4.9.40%
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Pairing of homologous chromosomes is completed in
1.Leptotene
2.Zygotene
3.Pachytene
4.Diplotene
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Percentage of water in brain cells is
1.20%
2.65%
3.85%
4.89%
Posted Date:-2021-09-01 20:23:59
Pox viruses are
1.RNA non-enveloped
2.RNA enveloped
3.DNA non-enveloped
4.DNA enveloped
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Reverse of prophase is
1.Interphase
2.Metaphase
3.Anaphase
4.Telophase
Posted Date:-2021-09-01 20:23:59
Reverse transcriptase is present in
1.All RNA viruses
2.All DNA viruses
3.All retroviruses
4.All viruses
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Ribosomes were discovered by
1.Golgi
2.De Duve
3.Palade
4.R.Brown
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Spread of tumor cells and establishment of secondary areas of growth is
1.Benign tumors
2.Cancer
3.Metastasis
4.Epistasis
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Tetrad or bivalent is
1.Paired homologous chromosome but not fused complex structure
2.2 unpaired homologous chromosome
3.Paired and fused complex structure
4.None of these
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The longest phase of meiosis I is
1.Metaphase
2.Anaphase
3.Prophase
4.Telophase
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Unbroken series of organisms arranged from ancestor to descendant sequence is
1.Biodiversity
2.Phyletic lineage
3.Connecting link
4.Evolutionary line
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Which division does not show replication of chromosomes?
1.Mitosis
2.Meiosis I
3.Meiosis II
4.None of these
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Which fibers intedigitate with each other?
1.Astral fibers
2.Kinetochore fibers
3.Polar fibers
4.All of these
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Which is a feature of malignant tumor?
1.Localized
2.Little deleterious effects
3.Few mitosis
4.Metastasize
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Which statement is not true about phragmoplast?
1.Formed from vesicle originating from Golgi apparatus
2.Present in plants only
3.Formed at the end of anaphase
4.Centre of dividing cell
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