Description : Cleavage divisions differ from normal mitotic divisions in that: (a) There is no nuclear division during cleavage (b) There is no division of cytoplasm during cleavage (c) The division of cytoplasm follows nuclear division (d) There is no period of growth in between divisions
Last Answer : Ans:(d)
Description : What are the animal pole and the vegetal pole of the vertebrate egg ?
Last Answer : The animal pole of a telolecithal egg is the portion of the egg with little vitellus, it is opposite to the vegetal pole that is the region where the yolk is concentrated.
Last Answer : The animal pole of a telolecithal egg is the portion of the egg with little vitellus, it is opposite to the vegetal pole that is the region where the yolk is concentrated. Image Diversity: animal and vegetal poles
Description : How is the production of a tissue-specific protein restricted to a particular tissue when the gene is present in the nucleus of all cells?
Last Answer : Most of the control of tissue-specific gene expression occurs at the level of transcription; this is achieved with tissuespecific transcription factors. E.g., all the genes that are to be expressed in ... when bound by a transcription factor, called GATA-1, which is present only in erythroid cells.
Description : The breakdown of pyruvate to give carbon dioxide, water and energy takes place in (i) cytoplasm (ii) mitochondria (iii) chloroplast (iv) nucleus -Biology
Last Answer : The break down of pyruvate to give carbon dioxide, energy and water takes place in the presence of oxygen and is termed as aerobic respiration. This process takes place in the mitochondria of a cell.
Description : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason (R ) `:` m-RNA is transferred fro
Last Answer : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the ... D. If both assertion and reason are false.
Description : Assertion: Nucleus controls the metabolic activitie of cytoplasm. Reason: Nucleus synthesizes enzymes and send them to cytoplasm to control the activi
Last Answer : Assertion: Nucleus controls the metabolic activitie of cytoplasm. Reason: Nucleus synthesizes enzymes and ... If both Assertion & Reason are false.
Description : What separate the nucleus and cytoplasm?
Last Answer : Nuclear envelope
Description : Which of the following statements is correct? (A) a nucleo protein usually contain deoxy sugars of the hexose type (B) Nucleoproteins are usually absent from the cytoplasm (C) Nucleoproteins usually are present in the nucleus only (D) Nucleoproteins usually occur in the nucleus and cytoplasm
Last Answer : Answer : D
Description : Which one is the heaviest particulate component of the cell? (A) Nucleus (B) Mitochondria (C) Cytoplasm (D) Golgi apparatus
Last Answer : A
Description : An important step in protein synthesis is transcription. Which of the following statement(s) is/are true concerning this process? a. The first step in gene transcription involves separating the double helix ... nucleus to the cytoplasm d. Only one protein can be produced from an initial mRNA strand
Last Answer : Answer: c Transcription of a gene begins at an initiation site associated with a specific DNA sequence, termed a promoter region. After binding to DNA, the RNA polymerase opens up a short ... different proteins from the same gene. mRNA is exported from the nucleus only after processing is complete
Description : The role of transfer RNS (IRNA) is to (a) Transfer mRNA from the nucleus to the cytoplasm (b) Carry amino acids from the cytoplasm to the nucleus (c) Carry the newly synthesised protein to its site of function in the cell (d) Transport amino acids to ribosomes
Description : Just as the division of cytoplasm is called cytokinesis, the division of nucleus is called (a) Heterosis (b) Mitosis (c) Meiosis (d) Karyokinesis
Description : The DNA of cell is mainly present in B A. Cytoplasm B. Nucleus C. Rough Endoplasmic reticulum D. Lysosomes
Last Answer : Nucleus
Description : Antigens are present (a) inside the cytoplasm (b) on nuclear membrane (c) inside the nucleus (d) on cell surface.
Last Answer : (d) on cell surface.
Description : DNA is mainly found in (a) nucleolus (b) nucleus only (c) cytoplasm only (d) none of these
Last Answer : b) nucleus only
Description : .Hammerling’s experiments of Acetabularia involved exchanging (a) cytoplasm (b) nucleus (c) rhizoid and stalk (d) gametes.
Last Answer : c) rhizoid and stalk
Description : .Experiments on Acetabularia by Hammerling proved the role of (a) cytoplasm in controlling differentiation (b) nucleus in heredity (c) chromosomes in heredity (d) nucleo-cytoplasmic ratio.
Last Answer : (b) nucleus in heredity
Description : Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with Components : (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic ... viii) (vi) (c) (vi) (v) (iv) (vii) (d) (v) (i) (iii) (ii)
Last Answer : (a) (v) (iv) (viii) (iii)
Description : The main area of various types of activities of a cell is (a) plasma membrane (b) mitochondrion (c) cytoplasm (d) nucleus.
Last Answer : (c) cytoplasm
Description : An organised and differentiated cellular structure having cytoplasm but no nucleus is (a) vessels (b) xylem parenchyma (c) sieve tubes (d) tracheids.
Last Answer : (c) sieve tubes
Description : Which of the following is not true for prokaryotic organism? A.Nucleus is not bounded by nuclear membrane B.Chromosomes does not contain histones C.80S ribosomes are distributed in cytoplasm D.Cell wall contains peptidoglycan as one of the major component
Last Answer : C.80S ribosomes are distributed in cytoplasm
Description : Which of the following is not true for prokaryotic organism? A- Nucleus is not bounded by nuclear membrane B- Chromosomes does not contain histones C- 80S ribosomes are distributed in cytoplasm D- Cell wall contains peptidoglycan as one of the major component
Last Answer : 80S ribosomes are distributed in cytoplasm
Description : low HGB low PLT and high WBC , peripheral smear shows blast cell with large nucleus and scant cytoplasm and some nucleoli -- positive meyloperoxidase test and negative esterase , DDx: - Acute lymphocytic - Acute myelocytic - Acute monocytic
Last Answer : Acute myelocytic
Description : The glucocorticoid receptor is located: A. On the outer surface of the cell membrane B. On the inner surface of the cell membrane C. In the cytoplasm D. Inside the nucleus
Last Answer : C. In the cytoplasm
Last Answer : (A) Nucleus
Description : Cells are commonly studied in the lab. If you were examining various unlabelled slides of cells under the microscope, you could tell if the cell was from a plant by the presence of (A) A nucleus (B) A cell membrane (C) Cytoplasm (D) A cell wall
Last Answer : (D) A cell wall
Description : Egg with peripheral cytoplasm around the yolk is
Last Answer : Egg with peripheral cytoplasm around the yolk is A. Isolecithal B. Microlecithal C. Telolecithal D. Centrolecithal
Description : Which one of the following is true regarding plant cells and animal cells ? (1) Plant cells contain chloroplast while animal cells do not (2) Plant cells are small while animal cells are large in ... nucleus while animal cells do not (4) Plant cells and animal cells are similar in all respects
Last Answer : (1) Plant cells contain chloroplast while animal cells do not Explanation: Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to ... varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.
Description : Which one of the following is true regarding plant cells and animal cells ? (1) Plant cells contain chloroplast while animal cells do not. (2) Plant cells are small while animal cells are large ... nucleus while animal cells do not (4) Plant cells and animal cells are similar in all respects
Last Answer : Plant cells contain chloroplast while animal cells do not.
Description : .Protein synthesis in an animal cell, takes place (a) in the cytoplasm as well as endoplasmic reticulum (b) only on ribose attached to nucleon (c) only in the cytoplasm (d) in the nucleolus as well as in the cytoplasm.
Last Answer : (d) in the nucleolus as well as in the cytoplasm.
Description : Protein synthesis in an animal cell occurs (a) only on the ribosomes present in cytosol (b) only on ribosome attached to the nuclear envelope and endoplasmic reticulum (c) on ribosome present in the ... as well as in cytoplasm (d) on ribosomes present in cytoplasm as well as in mitochondria.
Last Answer : (d) on ribosomes present in cytoplasm as well as in mitochondria.
Description : Protein synthesis in an animal cell, takes place (a) in the cytoplasm as well as endoplasmic reticulum (b) only on ribose attached to nucleon (c) only in the cytoplasm (d) in the nucleolus as well as in the cytoplasm.
Description : .Protein synthesis in an animal cell occurs (a) only on the ribosomes present in cytosol (b) only on ribosome attached to the nuclear envelope and endoplasmic reticulum (c) on ribosome present in the ... as well as in cytoplasm (d) on ribosomes present in cytoplasm as well as in mitochondria.
Description : On fertilization of egg nucleus with sperm nucleus
Last Answer : On fertilization of egg nucleus with sperm nucleus A. Second maturation is completed B. Embryo is ... body is formed D. First maturation is completed.
Description : Every multicellular organism, be it a microscopic alga, a banyan tree or a human being, starts as a single cell called a/an (a) Egg (b) Sperm (c) Nucleus (d) Gene
Last Answer : Ans:(a)
Description : In an egg, the type of cleavage is determined by (a) the amount and distribution of yolk (b) the number of egg membranes (c) the shape and size of the sperm (d) the size and location of the nucleus.
Last Answer : (a) the amount and distribution of yolk
Description : Which of the following pair have haploid structures? (a) Nucellus and antipodal cells (b) Antipodal cells and egg cell (c) Antipodal cells and megaspore mother cell (d) Nucellus and primary endosperm nucleus
Last Answer : (b) Antipodal cells and egg cell
Description : Double fertilisation is fusion of (a) two eggs (b) two eggs and polar nuclei with pollen nuclei (c) one male gamete with egg and other with synergid (d) one male gamete with egg and other with secondary nucleus.
Last Answer : (d) one male gamete with egg and other with secondary nucleus.
Description : What is the fate of the male gametes discharged in the synergid? (a) One fuses with the egg and other fuses with central cell nuclei. (b) One fuses with the egg, other(s) degenerates in the synergid. (c) All fuse with the egg. (d) One fuses with the egg, other(s) fuse(s) with synergid nucleus.
Last Answer : (a) One fuses with the egg and other fuses with central cell nuclei.
Description : Which one of the following pairs of plant structures has haploid number of chromosomes? (a) Nucellus and antipodal cells (b) Egg nucleus and secondary nucleus (c) Megaspore mother cell and antipodal cells (d) Egg cell and antipodal cells
Last Answer : d) Egg cell and antipodal cells
Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as
Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization
Description : What causes the current-carrying area at the center conductor of a coaxial line to be restricted to a small layer at the surface?
Last Answer : Skin effect.
Description : The function of the gap junction is to (a) separate two cells from each other (b) stop substance from leaking across a tissue (c) performing cementing to keep neighbouring cells together ( ... cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules.
Last Answer : (d) facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules.
Description : The cells of the quiescent centre are characterised by (a) having dense cytoplasm and prominent nuclei (b) having light cytoplasm and small nuclei (c) dividing regularly to add to the corpus (d) dividing regularly to add to tunica.
Last Answer : (b) having light cytoplasm and small nuclei
Description : The cells of the quiescent centre are characterised by (a) having dense cytoplasm and prominent nuclei (b) having light cytoplasm and small nuclei (c) dividing regularly to add to the corpus (d) dividing regularly to add to tunica
Last Answer : b) having light cytoplasm and small nuclei
Description : What are the identifying features of meristematic tissues? (a) thick cellulose wall, small vacuoles, dense cytoplasm, small nuclei (b) thin cellulose wall, almost no vacuoles, dense cytoplasm, ... sparse cytoplasm, prominent nuclei (d) thick cellulose, large vacuoles, sparse cytoplasm, small nuclei
Last Answer : (b) thin cellulose wall, almost no vacuoles, dense cytoplasm, prominent nuclei
Description : Correct the given sentences with justification. (i) The play is restricted to only a part of the woods.
Last Answer : Correct the given sentences with justification. (i) The play is restricted to only a part of the ... boy, there are some scenes from India too.
Description : The area of the human tongue sensitive to bitterness is restricted to : (1) tip (2) edges (3) middle part (4)posterior part
Last Answer : posterior part