Indicate whether the following statements are true or false. If a statement is f
ID: 67887 • Letter: I
Question
Indicate whether the following statements are true or false. If a statement is false, provide an explanation.
1. Injection of a molecule that blocks myosin function into dividing cells would cause cells to arrest in prometaphase.
2. during meiosis, chromosomes are partitioned so that each germ cell inherits only one copy of each of the different chromosomes.
3. Microtubules nucleate at the centromeres and then connect to the kinetochores.
4. the enzymatic activity of a Cdk protein is determined by the presence of a bound cyclin.
5. the movement of chromosomes by the spindle is driven only by microtubule motor proteins.
Explanation / Answer
1.Injection of a molecule that blocks myosin function into dividing cells would cause cells to arrest in prometaphase.-FALSE
Explanation: Myosin is mainly associated with muscle contraction and vacuole movement. It has no role to play in metaphase
2. During meiosis, chromosomes are partitioned so that each germ cell inherits only one copy of each of the different chromosomes.-TRUE
3. Microtubules nucleate at the centromeres and then connect to the kinetochores-TRUE
4. The enzymatic activity of a Cdk protein is determined by the presence of a bound cyclin-TRUE
5. The movement of chromosomes by the spindle is driven only by microtubule motor proteins. FALSE
Explanation: The chromosome movement occurs due to the activity of motor proteins in the kinetochore as well as due to polymerisation and depolymerisation of microtubules, together acting on the chromosome, causing its movement.