Cell Cycle and Cell Division - Online Test
Q1. Dinoflagellates possess condensed chromosomes even in interphase, their nucleus is called
Answer : Option B
Explaination / Solution:
Dinoflagellates are unicellular protists. They possess condensed chromosomes even during interphase. Their nucleus is called as mesokaryon.
Q2. Division of nucleus without being followed by cytokinesis results into
Answer : Option A
Explaination / Solution:
The division of nucleus or karyokinesis without being followed by cytokinesis results into increase in the content of nucleus, a condition known as multinucleate condition.
Q3. Which of the following phases in mitosis is in correct order?
Answer : Option D
Explaination / Solution:
- Mitosis. A four-stage process that creates two identical cells from one original cell.
- Prophase. The first and longest stage of mitosis. ...
- Metaphase. The second stage of mitosis. ...
- Anaphase. The third stage of mitosis. ...
- Telophase. The fourth and last stage of mitosis.
Q4. In the metaphase stage, the chromosomes are made up of
Answer : Option A
Explaination / Solution:
At metaphase stage, the chromosome is made up of two sister chromatids formed due to longitudinal splitting of the chromatids, which are held together by the centromere.
Q5. The nuclear structures disappear during
Answer : Option C
Explaination / Solution:
The nuclear envelope and the nucleolus disappear and the spindle fibres start forming at the opposite poles of the cell. Metaphase is marked by the alignment of chromosomes at the equatorial plate.
Q6. During zygotene stage chromosomes start pairing together and the process is called as
Answer : Option B
Explaination / Solution:
During zygotene stage, the homologous chromosomes start pairing together and this process of association is called synapsis. The paired homologous chromosomes are called bivalents.
Q7. The complex formed by a pair of synapsed homologous chromosomes is called
Answer : Option D
Explaination / Solution:
The complex formed by a pair of synapsed homologous chromosomes is called a bivalentor a tetrad. However, these are more clearly visible at the Prophase1 of Meiosis-1.
Q8. At the end of meiosis II how many cells are formed?
Answer : Option B
Explaination / Solution:
Four haploid cells are formed at the end of meiosis II. It is reductional division resulting in halving of chromosome number in daughter cells.
Q9. The plane of alignment of chromosome at metaphase is referred to as
Answer : Option B
Explaination / Solution:
The plane of alignment of the chromosomes at metaphase is referred to as the metaphase plate. This stage is also called as tetrad stage.
Q10. In which stage of mitosis, the number and shape of chromosome can be observed?
Answer : Option C
Explaination / Solution:
The metaphase is characterised by all the chromosomes coming to lie at the equator with one chromatid of each chromosome connected by its kinetochore to spindle fibres from one pole and its sister chromatid connected by its kinetochore to spindle fibres from the opposite pole.
