Which of the following shows a correct base pairing in DNA?
OA and G
OG andc
OCand A
OT andG

Answer:

the correct base pairing in DNA is G and C.

Explanation:

The pyrimidine cytosine(C) always pair with purine guanine(G)

The one that is showing correct base pairing in DNA is G and C. The correct option is B.

For DNA to be stable and maintain its integrity, the proper base pairing is essential. Adenine (A) pairs with thymine (T), and cytosine (C) couples with guanine (G), according to the base pairing laws.

As a result, the base pairing in DNA represented by G and C is correct. The two strands of the DNA double helix are kept together by the hydrogen bonds that form between the bases.

While cytosine and guanine make three hydrogen bonds, adenine and thymine only form two.

The correct replication and transcription of DNA as well as the generational transmission of genetic information are all made possible by this complimentary base pairing.

Thus, the correct option is B.

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Your question seems incomplete, the probable complete question is:

Which of the following shows a correct base pairing in DNA?

A. A and G

B. G and C

C. C and A

D. T and G

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Origin and Expansion of the Universe Lab Report

Introduction
Scientists have established a timeline of events after the Big Bang, based on astronomical observations and our understanding of the physical laws of the universe, such as gravity and the speed of light. In this lab activity, you will gather evidence to support the Big Bang theory.
Problem:
How can models demonstrate theories of our expanding universe?
Hypothesis:
Review the virtual lab demonstration in the lesson and stop the video when prompted to formulate a hypothesis. Hypothesize (or predict) what will happen to the distances between the labeled circles when you blow up the balloon ¼ full, ½ full, and ¾ full. Remember to include independent and dependent variables in your hypothesis.
The carbon dioxide represents how galaxies will spread out.
Materials:
Watch the virtual lab demonstration video within the lesson. No additional materials are needed.
Variables:
For this investigation:
List the independent variable(s):
List the dependent variable(s):
List the controlled variable(s):
Procedures:

1. Watch the virtual lab demonstration video within the lesson and record your observations in Table 1.
2. Using your expanding universe data from Table 1, construct a line graph using the volume of the below on the X axis and the distance between points on the Y axis. Be sure to include units and add titles to the graphs. Refer to the graph example and graphing tutorial in the lesson if needed.
3. Complete the Questions and Conclusion section of the lab report.
Data and Observations:
Table 1: Expanding Universe Observations


Galaxies Distance: Uninflated balloon (centimeters)
Distance: ¼ full (centimeters) Distance: ½ full (centimeters) Distance: ¾ full (centimeters)
A to B
A to C
A to D
B to C
B to D
C to D

Construct a line graph using the expanding the universe data from table 1. The volume will be plotted on the x-axis. The distance between the points will be plotted on the y-axis. Be sure to include units and add titles to the graph. Refer to the graph example and graphing tutorial in the lesson if needed.
Place your graph here.
Questions and Conclusion
1. How does the density and distribution of your “stars” change as the balloon expands?
2. How does your expanding balloon model represent an expanding universe?
3. What are some shortcomings of using this model as a replica of universe expansion?
4. How does the model you created help to show that the Steady State theory is inaccurate?
5. Suggest a way that a scientist could create an even more accurate model of universe expansion.
6. What will happen to the gravitational force between stars as the universe continues to expand?
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