Solved Hellesse ah vertanian Period: DNA Replication | Chegg.com - Free Printable

Let’s go step by step to solve the DNA replication worksheet problems.

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Problem 7:
You’re given a single strand of DNA:
A – T – G – C – G – G – C – G – A – T – T – T – A – A – G – C

You need to write the complementary strand. Remember the base pairing rules in DNA:
- Adenine (A) pairs with Thymine (T)
- Guanine (G) pairs with Cytosine (C)

So, for each letter, write its partner:

Original:
A T G C G G C G A T T T A A G C

Complement:
T A C G C C G C T A A A T T C G

✔ Double-check:
A→T, T→A, G→C, C→G — all match correctly.

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Problem 8:
You’re given a box with one strand:

```
T
A
G
C
```

You need to fill in the complementary strand next to it.

Using the same base pairing rules:

- T → A
- A → T
- G → C
- C → G

So the complementary strand is:

```
A
T
C
G
```

Now, you’re told to use two different colored pencils to create two new strands from the original strand (meaning: after replication, you’ll have two double helices, each with one old and one new strand).

But since we can’t draw colors here, we’ll describe it:

- Let’s say blue = original strand
- Let’s say red = new strand

After replication, you get two double-stranded DNA molecules:

Molecule 1:
Original (blue): T – A – G – C
New (red): A – T – C – G

Molecule 2:
Original (blue): T – A – G – C
New (red): A – T – C – G

Wait — actually, during DNA replication, the original double strand separates, and each serves as a template for a new complementary strand. But in this problem, you’re only given *one* strand in the box. So likely, they want you to assume that the box shows one side of a double helix, and you complete the other side — then show what happens when it replicates.

But looking at the instruction again:
> “fill in the complementary strand of DNA to create a double strand.”
> “using two different colored pencils, create two new strands from the original strand in the box.”

This suggests:

Step 1: Complete the double strand (original + complement).

Step 2: Simulate replication — so now you have two double strands, each with one original (colored one way) and one new (colored another way).

Since the box only has 4 bases, let’s do it simply:

Original strand (given):
T
A
G
C

Complementary strand (you fill in):
A
T
C
G

Now, for replication: imagine this double strand splits. Each strand becomes a template.

So you end up with TWO double strands:

Double Strand 1:
Original top (say, blue): T – A – G – C
New bottom (red): A – T – C – G

Double Strand 2:
Original bottom (blue): A – T – C – G
New top (red): T – A – G – C

But wait — the original strand was only the left column. The right column is the complement you added. So technically, the “original” is just the left column. When it replicates, both strands serve as templates.

To avoid confusion, here’s the simplest correct answer for the box:

Fill in the complementary strand as:

```
T A
A T
G C
C G
```

Then, for the two new strands after replication, you’d draw two copies of this double helix, coloring the original strand (left column) one color, and the newly made strands (right columns in each copy) another color.

But since we’re writing text, we’ll just state the completed double strand and note the coloring.

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Final Answer:

Problem 7 Complementary Strand:
T – A – C – G – C – C – G – C – T – A – A – A – T – T – C – G

Problem 8 Completed Box:

```
T A
A T
G C
C G
```

For replication: Use one color for the original left column (T, A, G, C), and another color for the new strands created during replication (which would be the right column in each of the two resulting double helices).