DNA biology 2

What does DNA stand for?

• Double nitrogen argon

• Deoxyribonucleic acid

• Dioxide nickel acid

• Does not apply

Answer explanation

DNA stands for Deoxyribonucleic acid, which is the correct choice. It is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

What is another name for the nucleotides in DNA?

• Chromosomes

• Bases

• Genes

• Backbone

Answer explanation

The nucleotides in DNA are also known as bases. Bases are the building blocks of DNA and play a crucial role in its structure and function.

What is the shape of a DNA molecule called?

• Octahedral

• Covalent

• Double Helix

• Triple triangle

Answer explanation

The shape of a DNA molecule is called Double Helix. It consists of two strands twisted around each other in a spiral formation.

Most genes within DNA hold instructions for the cell to make a specific _____.

• Carbohydrates

• Lipids

• Protein

Answer explanation

Genes within DNA hold instructions for the cell to make proteins.

What type of bond holds base pairs together?

• caring

• covalent

• ionic

• hydrogen

Answer explanation

Hydrogen bonds hold base pairs together. They are weak bonds formed between the hydrogen atom of one nucleotide and the oxygen or nitrogen atom of another nucleotide.

What are the 3 parts of a nucleotide?

• Protons, neutrons, electrons

• membrane, golgi, protein

• sugar, phosphate, nitrogenous base

• sugar, nitrogenous base, lipid

Answer explanation

A nucleotide consists of a sugar, a phosphate group, and a nitrogenous base. These three components make up the basic building blocks of DNA and RNA.

What would be the complementary DNA sequence for this template strand? TTAGACGAACCAT

• UAGGGAAGATAC

• AATCTGCTTGGA

• UUUGAAGCCAT

• GGCAATTCCAAT

Answer explanation

The complementary DNA sequence for the given template strand TTAGACGAACCAT is AATCTGCTTGGA. This choice is correct because it follows the base pairing rules of DNA where A pairs with T and G pairs with C.

In DNA, the percentage of __________ will always be the same as ____________.

• Thymine: Guanine

• Adenine:Cytosine

• Adenine: Guanine

• Adenine: Thymine

Answer explanation

In DNA, the percentage of Adenine will always be the same as Thymine. This is because Adenine forms a base pair with Thymine in DNA.

Which scientists discovered the structure of DNA?

• Jay Z and Beyonce

• Darwin and Wilson

• Hershey and Chase

• Watson and Crick

Answer explanation

The structure of DNA was discovered by Watson and Crick. They made this groundbreaking discovery in the field of genetics.

The base Cytosine will always pair with

• Thymine

• Guanine

• Adenine

• Uracil

Answer explanation

The base Cytosine always pairs with Guanine. This pairing is essential for DNA replication and transcription processes.