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Biology Chapter: DNA, Cells, and Genes

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Questions and Answers

What is the primary function of DNA in an organism?

Regulates the temperature of the cell

Carries hereditary factors in genes on chromosomes (correct)

Helps in the breakdown of nutrients

Provides energy for cellular functions

Which item in the cell contains the chromosomes?

Cell membrane

Cytoplasm

Mitochondria

Nucleus (correct)

Which option correctly defines a gene?

The complete set of chromosomes in a cell

A large section of DNA controlling all traits

A type of protein that influences cell activity

A small section on a chromosome (correct)

What are proteins primarily responsible for in the body?

Building muscles and organs Signup and view all the answers

Which of the following is NOT an example of a trait?

Energy level Signup and view all the answers

What is a mutation?

Change in the DNA code Signup and view all the answers

In the context of genetics, how are traits passed on?

Through proteins produced by genes Signup and view all the answers

How are DNA and proteins related?

DNA codes for proteins that determine traits Signup and view all the answers

What is the role of the cell in relation to DNA?

The cell contains DNA within the nucleus Signup and view all the answers

Which base pairs with adenine in a DNA sequence?

Thymine Signup and view all the answers

Study Notes

DNA Structure and Function

DNA is a structure containing hereditary factors located within genes on chromosomes.
DNA's sequence is made of bases (A, T, C, G) that pair up: A with T, and C with G.

Cell Structure and Components

A cell contains a nucleus, which is the control center.
Chromosomes, coiled DNA, are within the nucleus.

Genes and Traits

Genes are small sections on chromosomes.
Traits are characteristics passed through generations (e.g., hair color, eye color).
Proteins are necessary to build and repair body parts and are determined by genes.
Genes code for proteins, which determine traits.

Mutations

Mutations are changes in DNA's code that can be beneficial, harmful, or have no effect.

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Description

Explore essential concepts in biology, including the structure and function of DNA, the components of cells, and the role of genes in determining traits. Delve into mutations and their effects on heredity and evolution. This quiz will test your knowledge on these fundamental topics in life sciences.