DNA

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

A) It is present only in eukaryotic cells.
B) It is bounded by a single membrane.
C) It contains chromosomes.
D) It synthesizes lipids.

Q.

The functional segments of DNA are called ___ .

1. Fibres

2. RNA

3. Proteins

4. Genes

Q.

The chromosomal recombination is very important because it helps in ___ .

1. creating genetic diversity.

2. creating unique individuals.

3. creating mutations.

4. creating clones.

Q.

The functional segments of DNA are genes.

1. Chromatin

2. Histones

Q.

__ is the hereditary material of most organisms.

Q.

Statement 1: The four nitrogen bases in a DNA molecule are guanine, thymine adenine, cytosine.

Statement 2: Where adenine and thymine are purines and guanine and cytosine are pyrimidines.

1. Statement 1 is true and statement 2 is false

2. Statement 1 is false and statement 2 is true

3. Both the statements are false

4. Both the statements are true

Q. __ is the hereditary material of most organisms.

1. Nucleus
2. Cytoplasm
3. DNA
4. Vacuole

Q. Which of the following nutrients are produced by smooth endoplasmic reticulum?

1. Proteins
2. Fats
3. Vitamins
4. Glucose

Q. Identify the cell organelle that helps in photosynthesis.

1. Mitochondria
2. Nucleus
3. Chromoplast
4. Chloroplast

Q. Which of the following cell organelles contain DNA?

1. Ribosome
2. Lysosome
3. Mitochondria
4. Vacuole