Which of the following accurately describes the role of motor proteins during anaphase of mitosis?
Kinesins move chromosomes towards the minus ends of kinetochore microtubules, and dyneins move chromosomes towards the plus ends.
Dyneins move chromosomes towards the poles along kinetochore microtubules, while kinesins are involved in cytokinesis.
Kinesins move chromosomes towards the plus ends of kinetochore microtubules, while dyneins move the poles apart by acting on astral microtubules.
Both kinesins and dyneins move chromosomes towards the poles along kinetochore microtubules, with kinesins acting on the leading edge and dyneins on the trailing edge.
Related Questions
What type of plant is formed when colchicines is used in the process of development of Raphanobrassica?
Triploid
Haploid
Autotetraploid
Allotetraploid
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
Recombination of chromosome arms will occur
Chromosomes will not condense
Chromosomes will be fragmented
Chromosomes will not segregate
The spindle microtubules are polar, their orientation is
Positive (+) and negative (-) both ends towards the equator
Positive (+) ends towards the poles
negative (-) ends towards the poles
Positive (+) and negative (-) both ends towards the poles
I. Phases of cell cycle are controlled by proteins, …A… and …B…
II. There are two regulatory mechanisms, called …C… which take decision about cell division.
III. The second check point, called …D… is responsible for transition from to M-phase.
Identify A-D to complete the given statements (I-III)
A. Cyclins; B. CDKs; C. Checkpoints and growth factors; D. checkpoint
A. CDKs; B. Cyclins; C. Growth factors and kinases; D. M checkpoint
A. Kinases; B. Cyclins; C. Checkpoints and cyclins; D. checkpoint
A. Cyclins; B. CDKs; C. Mitosis promoting factors; D. S checkpoint
Mitosis or the equational division is usually restricted to …A… cells. However, in some lower plants and in some social insects …B… cells also divide by mitosis.
Choose the correct option for A and B from the given options
A B
Haploid; diploid
Haploid; haploid
Diploid; diploid
Diploid; haploid
Which of the following character is related with telophase?
Formation of nuclear membrane
Formation of nucleolus
Elongation of chromosome
Formation of two daughter nuclei
I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II. Nuclear envelope assembles around the chromosome clusters
III. Nucleolus, Golgi complex and ER reform
Above features indicates which phase of mitosis
Anaphase
Telophase
Cytokinesis
S-phase
I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II. Nuclear envelope assembles around the chromosome clusters
III. Nucleolus, Golgi complex and ER reform
Above features indicates which phase of mitosis
Anaphase
Telophase
Cytokinesis
S-phase
Centrioles undergo duplication during (i) of (ii), and begin to move towards opposite poles of the cell during (iii) stage of (iv)
i-S phase, ii-inter phase, iii- Prophase, iv-Mitosis
i-S phase, ii-Inter phase, iii-Anaphase, iv- Mitosis
i-Prophase, ii-Mitosis, iii-Metaphase, iv- Mitosis
i-Prophase, ii-Mitosis, iii-Anaphase, iv-Mitosis
Which of the following options gives the correct sequence of events during mitosis?
Prophase, Metaphase, Anaphase, Telophase
Metaphase, Prophase, Anaphase, Telophase
Anaphase, Telophase, Prophase, Metaphase
Telophase, Anaphase, Metaphase, Prophase
