Question

1. draw the basic structure of a nucleotide with its three parts.
2. write the complementary sequence to following dna strand:

a a t t c g c c g g t a t t a
t t a a g c g g c c a t a a t

1. use the image below to complete the following:

circle a nucleotide.
label the sugar and phosphate.
label the bases that are not already labeled.

Explanation:

Step1: Identify DNA base pairing rules

In DNA, adenine (A) pairs with thymine (T), cytosine (C) pairs with guanine (G).

Step2: Generate complementary sequence

Match each base in the given strand:
Given strand: $AATTCGCCGGTATTAA$
Complementary strand: $TTAAGCGGCCATAATT$

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For Question 11 (conceptual tasks):

1. Circle a nucleotide: A nucleotide consists of one phosphate (black circle), one sugar (pentagon), and one nitrogenous base (rectangle). Circle any set of these three connected structures.
2. Label sugar and phosphate: Label each black circle as "Phosphate" and each pentagon as "Sugar (Deoxyribose)".
3. Label unmarked bases: Use DNA pairing rules (A-T, C-G):

• The base paired with A is T
• The base paired with T is A
• The base paired with G is C
• The base paired with C is G
• The base paired with the second A is T
• The base paired with the second T is A

Answer:

1. Question 10 Complementary Sequence: $TTAAGCGGCCATAATT$
2. Question 11 Completion:

• Circle any connected phosphate (black circle) + sugar (pentagon) + base (rectangle) unit.
• Label black circles = Phosphate; Label pentagons = Sugar (Deoxyribose)
• Unlabeled bases (from top to bottom): T, A, C, G, T, A