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20 Questions

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Genes, DNA, and Variability

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Questions and Answers

What is the main purpose of DNA replication?

To synthesize proteins

To produce hormones

To ensure every cell has a complete copy of DNA (correct)

To regulate gene expression

Which enzyme is responsible for breaking the weak hydrogen bonds holding the opposing base pairs together during DNA replication?

Ribonuclease

Collagenase

Polymerase

Helicase (correct)

What is the role of RNA in protein synthesis?

Replicating DNA

Regulating gene expression

Serving as a template for protein production (correct)

Building amino acid chains

What is the function of introns in DNA?

Contain genetic information that does not code for proteins Signup and view all the answers

Which component of blood is responsible for binding oxygen to red blood cells?

Hemoglobin Signup and view all the answers

What happens during transcription in protein synthesis?

Formation of mRNA from DNA Signup and view all the answers

Why is it necessary to eliminate introns during post-transcriptional processing?

To produce mature mRNA for translation Signup and view all the answers

How many types of RNA are involved in protein synthesis?

3 Signup and view all the answers

What ensures that skin cells do not grow teeth during gene regulation?

Introns Signup and view all the answers

Which enzyme synthesizes a new copy of DNA using unpaired bases as a guide?

Polymerase Signup and view all the answers

Which molecule determines whether something is a potato or a person?

DNA Signup and view all the answers

What is the function of DNA?

Storage of genetic information Signup and view all the answers

In the DNA double helix, what are the two chains of nucleotides held together by?

Hydrogen bonds Signup and view all the answers

Which type of life form is characterized by having an organized nucleus around their DNA?

Eukaryotes Signup and view all the answers

What is the role of ribosomes in a cell?

Protein synthesis Signup and view all the answers

What is the main difference between prokaryotes and eukaryotes?

Lack of a nucleus in prokaryotes Signup and view all the answers

What is the function of genes in an organism?

Coding for proteins Signup and view all the answers

How do A and T, and G and C pair in the DNA double helix?

(A-T), (G-C), (C-T), (T-A) Signup and view all the answers

What is the main function of mitochondria in a cell?

Energy production Signup and view all the answers

What feature distinguishes Mitochondrial DNA from Nuclear DNA?

Distinct origin Signup and view all the answers