Nucleus

Q. Define nucleus. [1 mark]

Q.

Which among the following sequences is correct in describing the genetic material present in the nucleus from the most basic to the most complex?

1. $\mathrm{Gene}\to \mathrm{Nucleus}\to \mathrm{Chromosome}$
2. $\mathrm{Chromosome}\to \mathrm{Nucleus}\to \mathrm{Gene}$
3. $\mathrm{Gene}\to \mathrm{Chromosome}\to \mathrm{Nucleus}$
4. $\mathrm{Nucleus}\to \mathrm{Gene}\to \mathrm{Chromosome}$

Q. Following are the characteristics of an organelle. Identify the organelle.
A. Large and spherical structure
B. Present in almost all eukaryotic cells
C. In animal cell, it lies at the centre of the cell
D. In plant cell, it is towards the periphery
E. Controls all the activities of the cell

1. Vacuole
2. Chloroplast
3. Nucleus
4. Mitochondrion

Q. The matrix inside the nucleus in which the chromosomes are embedded is called ___.

1. Nucleoplasm
2. Nucleic acid
3. Cytoplasm
4. Protoplasm

Q. The helps in the transmission of characters from parents to offsprings.

1. Nucleus
2. Chromosome
3. Nucleolus

Q. In a non-dividing cell, DNA is present as a mass of thread-like structures known as _______ .

1. chromosome
2. chromatin
3. cytoplasm
4. ribosomes

Q. Bacteria has an undefined nuclear region containing only nucleic acids known as 'nucleoid'.

1. True
2. False

Q. Which of the following statement(s) is/are true about the nucleus?

1. It is present only in eukaryotic cells.
2. It is bounded by a single membrane.
3. It contains chromosomes.
4. It synthesizes lipids.

Q.

What are the long strands of genetic material in the nucleus called?

1. Chromatin

2. Cytoplasm

3. Membrane

4. Nucleic acid

Q.

Who discovered the cell nucleus?

1. Robert Brown

2. Leeuwenhoek
3. Robert Hooke
4. Robert Swanson