DNA

Which of the following statements concerning genes and chromosomes is correct?

May/June 2017

Which statement concerning chromosomes is correct?

May/June 2017

Chromosomes, DNA molecules and genes are inherited structures of different lengths. Which statement best explains how these pieces of inherited material are related?

May/June 2021

A DNA strand has 100 nucleotide pairs. Of the nucleotides present, 46 contain the base A. How many nucleotides in this DNA strand contain the base T?

May/June 2023

DNA stores genetic information as genes.

May/June 2023

A student made some mistakes in statements about chromosomes. 1 A human body cell has $46$ pairs of chromosomes. 2 Chromosomes are found in pairs in gametes. 3 Each body cell in a male has one $X$ chromosome and one $Y$ chromosome. 4 A chromosome contains one long DNA molecule that is divided into sections called genes. 5 Genes are split into sections called DNA molecules, which are included in chromosomes. Which two statements are correct?

May/June 2024

Use terms from the list to complete Table 3.1 by matching each description with the correct term.

May/June 2024

A cell nucleus contains DNA molecules, and these molecules control cell function. Fig. 6.1 shows a diagram of one of these DNA molecules.

May/June 2025

A gene is a hereditary unit that determines the production of

Oct/Nov 2017

What is DNA's main function?

Oct/Nov 2018

What is the main role of DNA?

Oct/Nov 2018

Which of the following statements about DNA are correct?

Oct/Nov 2019

A student made some comments about chromosomes, but several are inaccurate. 1. A human body cell contains $46$ pairs of chromosomes. 2. In gametes, chromosomes occur in pairs. 3. Males have one X chromosome and one Y chromosome in every body cell. 4. Chromosomes consist of a long DNA molecule that is split into regions called genes. 5. Chromosomes contain genes that are divided into regions called DNA molecules. Which two statements are correct?

Oct/Nov 2019

What is the right sequence for the sizes of the genetic material pieces listed in the table, from the smallest to the largest?

Oct/Nov 2022

In a DNA molecule, the strands are held together by bonds between base pairs. Which base pairs occur in DNA?

Oct/Nov 2023

Fig. 6.1 presents a biological molecule.

Oct/Nov 2023

DNA is split into sections called

Oct/Nov 2024

Chromosomes, DNA molecules and genes are units of inherited material that differ in size. Which statement describes how these units of inherited material are related?

Oct/Nov 2025

The diagrams depict some plant cells and animal cells. They are not drawn to the same scale. Which cells have haploid nuclei?

Oct/Nov 2025

A karyotype is a photograph displaying the chromosomes of an individual. Which description corresponds to an individual with this karyotype?

Oct/Nov 2025