Question

1. In eukaryotic cells, DNA occurs only in:

A) cell nuclei, mitochondria, Golgi apparatus B) mitochondria, Golgi apparatus, chloroplasts C) cell nuclei, lysosomes, chloroplasts
D) cell nuclei, mitochondria, chloroplasts
E) mitochondria, chloroplasts, lysosomes

Answer 1

Answer:

only mitochondria

Explanation:

hope it helps you

Answer 2

The answer is:

Option D)  cell nuclei, mitochondria, chloroplasts

• The majority of DNA is found in the cell nucleus of eukaryotic cells even though some DNA is also present in other organelles, such as in the mitochondria and the chloroplast in plants. Known as chromosomes, nuclear DNA is arranged into a linear structure.
• Significant species differences exist in chromosomal size and number.
• For instance, a toad (Xenopus laevis) has 18 chromosomes, compared to the fruit fly's (4, Drosophila)
• Eukaryotic DNA contains telomeres at either end to prevent degradation and is linear, compressed into chromosome with histones.
• Nuclear DNA and mitochondrial DNA are both present in eukaryotic cells.
• Prokaryotes split more easily by binary fission while eukaryotes split duplicated chromosomes through mitosis, which uses cytoskeletal proteins.
• Each of the bunches of chromosomes that make up eukaryotic DNA is made up of a linear DNA molecule that has been wound round basic proteins called histones to make it more compact.

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