Problem Analysis:
The task involves filling in the blanks in a worksheet about DNA and genes. The worksheet aims to teach the fundamental concepts of DNA, including its structure, components, and how it encodes genetic information.
Solution:
####
Section 1: DNA & Genes
1.
What is a gene?
- A gene is a sequence of
nucleotides that codes for a specific
protein (or
RNA).
2.
Where do you find one?
- They are found within the
DNA molecule of
chromosomes.
####
Section 2: DNA Structure
-
DNA is a long molecule consisting of Deoxyribose, Phosphate, and a nitrogenous base. One of each of these components bonded together correctly forms a nucleotide. The whole DNA molecule has two strands, and twists together to form a ________ ________.
- The whole DNA molecule has two strands, and twists together to form a
double helix.
-
There are ___ different nitrogenous bases, ________, ________, ________, ________.
- There are
4 different nitrogenous bases:
Adenine,
Thymine,
Cytosine,
Guanine.
-
These are shortened to their respective letters, __, __, __, __.
- These are shortened to their respective letters:
A, T, C, G.
-
The bases form weak bonds between the two strands, which holds the whole structure together. There are very strict rules governing which base bonds with which base:
-
Adenine will always bond with ________
- Adenine will always bond with
Thymine.
-
Guanine will always bond with ________
- Guanine will always bond with
Cytosine.
Final Filled Worksheet:
####
DNA & Genes
- A gene is a sequence of
nucleotides that codes for a specific
protein (or
RNA).
- They are found within the
DNA molecule of
chromosomes.
####
DNA Structure
- DNA is a long molecule consisting of Deoxyribose, Phosphate, and a nitrogenous base. One of each of these components bonded together correctly forms a nucleotide. The whole DNA molecule has two strands, and twists together to form a
double helix.
- There are
4 different nitrogenous bases:
Adenine,
Thymine,
Cytosine,
Guanine.
- These are shortened to their respective letters:
A, T, C, G.
- The bases form weak bonds between the two strands, which holds the whole structure together. There are very strict rules governing which base bonds with which base:
- Adenine will always bond with
Thymine.
- Guanine will always bond with
Cytosine.
Explanation:
1.
Genes: Genes are segments of DNA that encode instructions for making proteins or RNA molecules. They are located on chromosomes within the nucleus of a cell.
2.
DNA Structure:
- DNA is composed of three main components: deoxyribose (a sugar), phosphate groups, and nitrogenous bases.
- The four nitrogenous bases are Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
- The bases pair specifically: Adenine pairs with Thymine (A-T), and Guanine pairs with Cytosine (G-C). These base pairs are held together by hydrogen bonds.
- The double-stranded DNA molecule twists into a double helix shape.
Final Answer:
\boxed{
\text{Gene: sequence of nucleotides coding for protein/RNA, found in DNA of chromosomes.}
\text{DNA: double helix, 4 bases (A, T, C, G), A-T, G-C pairing.}
}
Parent Tip: Review the logic above to help your child master the concept of what is dna worksheet.
