Cell division - class-IX
Description: cell division | |
Number of Questions: 61 | |
Created by: | |
Tags: structure of living organisms biology division for growth and reproduction cell cycle and cell division cell and cell organelles life processes: reproduction, growth and development cell division reproduction - the generating system structure of chromosome, cell cycle and cell division |
Generally, decline in hearing power begins after the age of
Cell which keeps changing it's shape is called
Power is regeneration is poor in.
Storage sprouting of potato can be prevented by
The process of cell death involving DNA cleavage in cells is known as
Glucose and amino acids are absorbed through the following part of villus.
Number of cells daily replaced in human body is
Heparin is formed by.
Fat absorbed from gut is transported in blood as
Basement membrane is formed of.
Angiotensinogen is a protein secreted by
Calcium occurs in
Division of the nucleus is called ..........
All nuclear changes that occur during mitotic cell division are collectively called as
The epithelial cells lining the stomach of vertebrates are protected from damage by HCl because.
Epithelial cells serves the function of protection, secretion and absorption and is separated from the other tissues below by a _____.
Cell cycle was divided into four stages i.e. G$ _1$, S, G$ _2$, M by
Which of the following stage of M-phase is considered as tetraploid stage?
A cell divides in order to?
Chromosome decondensation, crossing over synapsis formation, nucleolus disappear, chromosome separation, astral ray formation, centriole duplication. How many of these are observed in prophase of meiosis-1 and mitosis both?
The life of all multicellular organisms through sexual reproduction starts as a ............
What would be the DNA content of the cell at G1, G2, anaphase stage, when the content after the mitotic phase is 40pg
The most dramatic period of the cell cycle is
identify correct order of Eukaryotic cell...
Cell wall thickning and protoplasmic modification during growth of plants occur in ________________.
The stage of cell cycle when cell does not undergo differentiation is
During cell cycle, RNA and protein synthesis takes place during which of the following phase?
The sequence of cell cycle is
The various phases of the cell cycle will be affected by limiting growth factors like
Generation time represents period of
The correct order of the various phases of eukaryotic cell cycle is ____________.
Identify, the correct sequence of the cell cycle events.
I. Nuclear membrane dissolves
II. Cell size increases
III. Two daughter cells form
IV. DNA replicates
Mitotic cell cycle is divided typically into four phases, $G _1$, S, $G _2$ and M. Considering a mitotic cycle time of $18$ hours, the distribution of period of time(in hours) for each of these phase will be. $G _1$S$ _2$M.
Yeast complete cell cycle in _____________.
Cell cycle was discovered by
In a culture of E.coli the cell population increased from $1.5 \times 10^6$ cells /ml to $ 12 \times 10^6$ cells/ml in 36 minute.The generation time is
Cdk which control progression through cell cycle check points are fully activated by.
Which cellular organelles are involved in initration of intrinsic pathway of apoptosis?
Which represents the correct sequence of stages in the cell cycle?
Of the total duration of cell cycle, the interphase lasts more than.
The cell is not allowed to past the cell cycle restriction point, DNA damage is detected. Which of the following proteins are involved in detection of DNA damage and inhibition of cycle at the restriction point?
In order to enter cell cycle a cell must be stimulated from outside. What type of molecule provides this stimulation?
Select the correct option:
Select the correct option:
Select the correct option:
Select the correct option:
(i) M phase represents the phase when actual cell division occurs and I phase represents the phase between two successive M phases.
(ii) In the 24 hours average duration of cell cycle of a human cell, cell division proper lasts for only about an hour.
(iii) M phase constitutes more than 95% of the duration of cell cycle.
How many following statements are correct?
(A) Nucleus as a cell organelle was first described by Robert Brown as early as 1651.
(B) The interphase nucleus has highly condensed nucleoprotein fibres called chromatin.
(C) During different stages of cell division, cells show structured chromatin in place of the nucleus.
(D) Every chromosome essentially has a primary constriction which is also known as NOR.
(E) Many membrane-bound minute vesicles called microbodies that contain various enzymes are present in both plant and animal cells.
Which of the following is the most direct cuse of polyteny in somatic cells of certain organisms?
Which one of the following events is incorrect for cell cycle?
The most dramatic period of the cell cycle is?
Intermitosis is
How many chromosomes will the cell have at GI, after S and after M-phase respectively if it has 14 chromosomes at interphase
Match the lists and choose the correct option:
a. | $G _1$ phase | i. | Replication of DNA |
---|---|---|---|
b. | S-phase | ii. | Quiescent stage |
c. | $G _2$-phase | iii. | Condensation chromatin |
d. | $G _0$-phase | iv. | Protein synthesis |
v. | Interval between mitosis and initiate of DNA replication |
Which stage of cell cycle occurs immediately prior to mitosis
The method of reproduction in unicellular organisms like amoeba and bacteria in which they split into two equal halves and produce new ones is called ............
In animal cells, cytokinesis involves
In animal cytokinesis, cleavage occurs with the help of
Cytochalasin B is a drug isolated from moulds. It blocks the formation of contractile microfilaments. Which of the following aspects of the cell cycle would be most disrupted due to this ?