Description : In which stage of cell cycle, DNA replication occurs? (a) G1-phase (b) S-phase (c) G2-phase (d) M-phase
Last Answer : (b) S-phase
Description : During `G_(2)` -phase a diploid cell contains the amount of DNA equal to a :-
Last Answer : During `G_(2)` -phase a diploid cell contains the amount of DNA equal to a :- A. Diploid ... Tetraploid cell C. Haploid cell D. Nothing can be said
Description : The number of DNA in chromosome at `G_(2)` stage of cell cycle
Last Answer : The number of DNA in chromosome at `G_(2)` stage of cell cycle A. One B. Two C. Four D. Eight
Description : In the somatic cell cycle (a) in G1 phase DNA content is double the amount of DNA present in the original cell (b) DNA replication takes place in S phase (c) a short interphase is followed by a long mitotic phase (d) G2 phase follows mitotic phase.
Last Answer : (b) DNA replication takes place in S phase
Description : Which one is correct for `G_(0)` stage ? I. It is a quiescent stage. II. In this phase cell cycle is stopped III. `G_(0)` cells do not grow or prolife
Last Answer : Which one is correct for `G_(0)` stage ? I. It is a quiescent stage. II. In this phase cell cycle ... . I,II are correct D. Only I and IV are correct
Description : . DNA replication in bacteria occurs (a) within nucleolus (b) prior to fission (c) just before transcription (d) during S phase.
Last Answer : (b) prior to fission
Description : DNA replication in bacteria occurs: (1) Within nucleolus (2) Prior to fission (3) Just before transcription (4) During S phase
Last Answer : (2) Prior to fission
Description : Multiple checkpoints in the eukaryotic cell cycle ensure that division occurs only after sufficient growth and faithful DNA replication, and only when favorable conditions exist. Of the many proteins involved in ... CDKs) are among the most important. How do CDKs function to control the cell cycle?
Last Answer : CDKs phosphorylate various protein substrates that are required for cell cycle progression. Some of the important substrate proteins that CDKs phosphorylate include condensin proteins, which are essential ... which form a stabilizing network under the nuclear membrane that assembles during mitosis.
Description : DNA replication occur in which stage of cell division? (a) G1 phase (b) G2 phase (c) S phase (d) M phase
Last Answer : (c) S phase
Description : DNA contains some palindromic sequences which (A) Mark the site for the formation of replication forks (B) Direct DNA polymerase to turn back to replicate the other strand (C) Are recognized by restriction enzymes (D) Are found only in bacterial DNA
Last Answer : Answer : C
Description : Spontaneous mutations could arise from a. DNA replication errors. b. Atmospheric Radiation. c. Addition Of Insertion Sequences. d. All the above (A—C) are correct.
Last Answer : d. All the above (A—C) are correct.
Description : At a chromosome replication fork, the lagging strand consists of__ That is joined by___. a. RNA sequences; DNA ligase b. Okazaki Fragments; RNA Polymerase c. RNA sequences; ribosomes d. Okazaki fragments; DNA ligase
Last Answer : d. Okazaki fragments; DNA ligase
Description : If the cell had diploid or 2n number of chromosomes at `G_(1)`, after S phase the number of chromosomes in the cell is ?
Last Answer : If the cell had diploid or 2n number of chromosomes at `G_(1)`, after S phase the number of chromosomes in the cell is ? A. 2 n B. 4 n C. n D. 3n
Description : If the cell is diploid in `G_(1)` than after the S phase cell remain/become:-
Last Answer : If the cell is diploid in `G_(1)` than after the S phase cell remain/become:- A. n B. 4n C. 8n D. 2n
Description : In mammalian cell cycle, synthesis of DNA occurs during (A) S phase (B) G1 phase (C) Mitotic Phase (D) G2 phase
Last Answer : Answer : A
Description : $ DNA replication in a bacterial cell is bidirectional. ! A chromosomes with primary constriction is called "SAT" chromosomes.
Last Answer : $ DNA replication in a bacterial cell is bidirectional. ! A chromosomes with primary constriction is called "SAT ... D. If both As and R are wrong.
Description : During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C? (a) G0 and G1 (b) G1 and S (c) Only G2 (d) G2 and M
Last Answer : (c) Only G2
Description : $ The enzymes which joins short pieces DNA in the laggins strand is called ligase. ! Lagging strand and leading strand are formed due to replication f
Last Answer : $ The enzymes which joins short pieces DNA in the laggins strand is called ligase. ! Lagging strand and ... wrong D. If both As and R are wrong.
Description : $ DNA replication is semiconservative. ! Helicases are the enzymes which can break the hydrogen bonds between the nuclotides of DNA
Last Answer : $ DNA replication is semiconservative. ! Helicases are the enzymes which can break the hydrogen bonds between the ... D. If both As and R are wrong.
Description : When cell has stalled DNA replication fork, which checkpoint should be predominantly activated? (a) G1/S (b) G2/M (c) M (d) Both G2/M and M
Last Answer : b) G2/M
Description : Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of (a) M phase (b) G1 phase (c) S phase (d) G2 phase.
Last Answer : (b) G1 phase
Description : Satellite DNA is important because it (a) does not code for proteins and is same in all members of the population (b) codes for enzymes needed for DNA replication (c) codes for proteins ... and also the same degree of polymorphism in an individual, which is heritable from parents to children.
Last Answer : (d) shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children
Description : Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place during meiosis-II.
Last Answer : Assertion : Replication of DNA not occurs during interkinesis. Reason : Divison of chromosomes takes place ... . If both Assertion & Reason are false.
Description : Identify the correct statement with regard to G1 phase (Gap 1) of interphase. (a) DNA synthesis or replication takes place. (b) Reorganisation of all cell components takes place. (c) Cell is metabolically active, grows but does not replicate its DNA. (d) Nuclear division takes place.
Last Answer : (c) Cell is metabolically active, grows but does not
Description : The type of recombination that commonly occurs between a pair of homologous DNA sequences is, A- mutagenic recombination B- site-specific recombination C- replicative recombination D- general recombination
Last Answer : general recombination
Description : In genetic engineering, the antibiotics are used (a) as selectable markers (b) to select healthy vectors (c) as sequences from where replication starts (d) to keep the cultures free of infection.
Last Answer : (a) as selectable markers
Description : Which typical stage is known for DNA replication? (a) S-phase (b) G2-phase (c) metaphase (d) G1-phase
Last Answer : (a) S-phase
Description : Which of the following is wrong about `G_(1)` phase?
Last Answer : Which of the following is wrong about `G_(1)` phase? A. G-1 Stage followed by Mitosis B ... Cell grows continuously D. Cell does not replicate its DNA
Description : During which phase(s) of cell cycle amount of DNA in a cell remains at 4C level if the initial amount is denoted an 2C
Last Answer : During which phase(s) of cell cycle amount of DNA in a cell remains at 4C level if the initial amount is denoted ... Only `G_(2)` D. `G_(2)" and M`
Description : Bleomycin is used in most effective drug combination regiment for the chemotherapy of testicular carcinoma. Which one of the following statements about the drug is accurate? (a) Acts mainly in the ... neuropathy occurs in more than 50% of patients (e) Pulmonary infiltrates and fibrosis may occur
Last Answer : Ans: E
Description : What DNA replication occurs in preparation for?
Last Answer : Both mitosis and meiosis
Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes
Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes
Description : Mark incorrect statements :- (A) Meiosis involves only a single cycle of DNA replication (B) Four haploid cells are formed at the end of meiosis-I ( C
Last Answer : Mark incorrect statements :- (A) Meiosis involves only a single cycle of DNA replication (B) Four haploid ... and C C. Only B D. All are correct
Description : During which phase of the cell cycle are normal components of the cell synthesized and assembled? a) the M phase b) the G1 phase c) the S phase d) the G2 phase
Last Answer : ANSWER: B -- THE G1 PHASE
Description : Gap between division phase and start of DNA-replication is called :-
Last Answer : Gap between division phase and start of DNA-replication is called :- A. `G_(1)-"phase"` B. `G_(2)-"phase"` C. M - phase D. Interkinesis
Description : During cell growth, DNA synthesis takes place on (a) S-phase (b) G1-phase (c) G2-phase (d) M phase.
Description : In a somatic cell cycle, DNA synthesis takes place in (a) G1 phase (b) prophase of mitosis (c) S-phase (d) G2 phase.
Last Answer : (c) S-phase
Description : In ‘S’ phase of the cell cycle (a) amount of DNA doubles in each cell (b) amount of DNA remains same in each cell (c) chromosome number is increased (d) amount of DNA is reduced to half in each cell.
Last Answer : (a) amount of DNA doubles in each cell
Description : A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has (a) twice the number of chromosomes and four times the amount of DNA (b) ... of chromosomes and twice the amount of DNA (d) same number of chromosomes but twice the amount of DNA
Last Answer : (a) twice the number of chromosomes and four times the amount of DNA
Description : $ Krebs cycle occurs in the matrix of mitochondria. ! ATP as is a respiratory enzyme.
Last Answer : $ Krebs cycle occurs in the matrix of mitochondria. ! ATP as is a respiratory enzyme. A. If both As and ... R is wrong D. If both As and R are wrong.
Description : Cistron is a) The coding sequence of DNA b) The functional unit of DNA molecule that codes for a particular gene product c) Intervening non coding sequence of DNA d) The sequences which are removed during RNA splicing.
Last Answer : b) The functional unit of DNA molecule that codes for a particular gene product c) Intervening non coding sequence of DNA
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 : Can there be DNA replication without cell division? -Biology
Last Answer : Yes, there can be DNA replication without involvement of cell division in a cell and one such condition existential is called as 'Polyteny'. Polyteny basically occurs because of failure of ... observed in Order Diptera of Class Insecta of Phylum Arthropoda (eg- Drosophila Salivary glands).
Description : The sulfonamides interfere with bacterial metabolism by a. blocking cell wall synthesis. b. disrupting folic acid metabolism. c. reacting with bacterial cell membranes. d. inhibiting DNA replication.
Last Answer : b. disrupting folic acid metabolism.
Description : The development of global regulatory systems in prokaryotes A- determines the exact location of the cell on the globe B- aids in DNA replication C- .determines the exact location of the replication site D- regulates many genes under varying environmental conditions
Last Answer : regulates many genes under varying environmental conditions
Description : Which one of the following is NOT an event of sporulation? a. Symmetrical cell divisions b. Mother cell disintegration c. DNA replication d. Prespore engulfment by the mother cell
Last Answer : a. Symmetrical cell divisions
Description : Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle? (a) Decondensation from chromosomes and reassembly of the nuclear lamina (b) ... and formation of the phragmoplast (d) Formation of the contractile ring and transcription from chromosomes
Last Answer : (c) Formation of the contractile ring and formation of the phragmoplast
Description : The eukaryotic cell cycle consists of discrete phases. One of these is named the M or mitosis phase during which the cell divides. Following the M phase is a period known as interphase that is made up of three distinct phases. Name, in order, the three separate phases of interphase.
Last Answer : G1, S and G2
Last Answer : 45y The value of g_ is considered to be the equivalent of latitude sea level .