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Applicants who choose to take the TOEFL iBT Paper Edition must pay an amount of INR 16,900 for registering, which is the same for TOEFL iBT.

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The TOEFL iBT Paper Edition is offered once or twice every month.

As the TOEFL iBT exam is conducted in two sessions, do I have to book two dates or one?

You need to schedule two appointments when you register: one at your neighbourhood testing facility and the other at your house.

In some places, why is the duration of the first session of TOEFL iBT Paper Edition written as three and half hours? What is the actual duration?

The test duration at a centre is three hours. An additional thirty minutes is allocated for test administration tasks, such as admitting examinees, allowing them to input identifying information, and managing test materials.

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As the Speaking section is conducted from home, please ensure that you have the required setup for both the equipment and environment before registering. You will get the details from the official website.

The Structure of DNA and Genetic Inheritance

Home Practice Tests TOEFL Listening Practice Tests

The Structure of DNA and Genetic Inheritance - TOEFL Listening Practice Test

Prity Mallick

6 min read

Updated On December 04, 2024

"Prepare for the TOEFL Listening Section with a practice test on 'The Structure of DNA and Genetic Inheritance' and learn the skills to improve your score in the TOEFL exam. "

Key Highlights

Conversation on The Structure of DNA and Genetic Inheritance
Questions
Transcript of the Audio Conversation on The Structure of DNA and Genetic Inheritance
Answers and Explanations of the Conversation on The Structure of DNA and Genetic Inheritance

The TOEFL Listening section is designed to assess your ability to understand spoken academic English, particularly in lecture formats. This section features a variety of listening passages, including lectures on scientific topics, which require you to grasp key concepts and details. You will encounter multiple-choice questions that challenge your comprehension and critical thinking skills, making it essential to practice effectively.

To aid in your preparation, we’ve created a listening practice set focused on "The Structure of DNA and Genetic Inheritance." This set will not only help you understand the complexities of DNA but also enhance your ability to extract important information from academic lectures. By familiarizing yourself with the structure and function of DNA, you will improve your overall listening skills and gain confidence in tackling TOEFL questions. Let’s embark on this educational journey together and sharpen your listening abilities!

Listening Instructions

You can listen to each conversation and lecture only once.
You have approximately 8 minutes to listen to the conversation/lecture and respond to the questions.
Each question generally carries one point unless otherwise specified in the instructions, which will explicitly state the assigned points for specific questions.
After listening to the Conversation, respond to questions related to the topic based on explicit or implicit statements made by the speakers.
Feel free to make notes as you listen. You can refer to your notes to aid in answering the questions.
We recommend practicing note-taking with a pen and paper, similar to what you'll do during the TOEFL Exam.

Conversation on The Structure of DNA and Genetic Inheritance

Now listen to the audio.

The Structure of DNA and Genetic Inheritance - TOEFL Listening

Questions

Directions: Mark your answer by selecting your choice.

Gist-Content Questions

What is the main topic of the lecture?
1. The role of proteins in genetics
2. The structure of DNA and its role in genetic inheritance
3. The history of genetic research
4. The process of reproduction in living organisms

Detail Questions

According to the professor, what are the components of a nucleotide?
1. A phosphate group, a sugar molecule, and a nitrogenous base
2. A sugar molecule, a protein, and a lipid
3. A nitrogenous base, a carbohydrate, and a mineral
4. A phosphate group, a nitrogenous base, and an amino acid

Function Questions

What does the professor mean when he says, "This process ultimately shapes the characteristics of living organisms across generations"?
1. DNA replication is a simple process.
2. Genetic inheritance determines the traits of organisms.
3. Organisms do not change over generations.
4. The structure of DNA is irrelevant to inheritance.

Attitude Questions

What is the professor's attitude towards the complexity of DNA?
1. Dismissive
2. Appreciative
3. Confused
4. Indifferent

Organization Questions

Why does the professor mention James Watson and Francis Crick?
1. To highlight the discovery of DNA's structure
2. To discuss their contributions to genetic engineering
3. To explain the process of DNA replication
4. To illustrate the importance of nitrogenous bases

Connecting Content Questions

What can be inferred about the significance of DNA in living organisms?**
1. DNA is only important for plants.
2. DNA is only important for plants.
3. DNA plays a crucial role in determining traits and inheritance.
4. The structure of DNA is irrelevant to genetic inheritance

Transcript of the Audio Conversation on The Structure of DNA and Genetic Inheritance

Today, we will explore the intricate structure of DNA and its pivotal role in genetic inheritance. DNA, or deoxyribonucleic acid, serves as the hereditary material in all living organisms, and understanding its structure is essential for comprehending how traits are transmitted from one generation to the next.

To begin with, the DNA molecule consists of two long strands that twist around each other, forming a double helix. This iconic structure was first elucidated by James Watson and Francis Crick in 1953. Each strand is composed of a sequence of nucleotides, which are the fundamental units of DNA. A nucleotide comprises three components: a phosphate group, a sugar molecule, and a nitrogenous base. There are four types of nitrogenous bases—adenine, thymine, cytosine, and guanine—commonly abbreviated as A, T, C, and G. Notably, these bases pair in a specific manner: adenine pairs with thymine, while cytosine pairs with guanine.

Next, let us examine how DNA is integral to genetic inheritance. During reproduction, DNA is replicated and passed on to offspring, ensuring that genetic information is preserved and transmitted. Genes, which are segments of DNA, contain the instructions for synthesising proteins that determine an organism's traits. For instance, a particular gene may dictate the colour of a flower or the shape of a fruit.

In conclusion, the structure of DNA is not only remarkable in its complexity but also vital for understanding genetic inheritance. The double helix, composed of nucleotides and characterised by specific base pairing, facilitates the accurate replication and transmission of genetic information. This process ultimately shapes the characteristics of living organisms across generations, highlighting the profound significance of DNA in the biological world.

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Answers and Explanations of the Conversation on The Structure of DNA and Genetic Inheritance

1. Answer: B. The structure of DNA and its role in genetic inheritance.

Explanation: The lecture primarily focuses on the structure of DNA and its critical function in genetic inheritance. It discusses how DNA serves as the hereditary material in all living organisms and explains the significance of its double helix structure in transmitting genetic information across generations.

2. Answer: A. A phosphate group, a sugar molecule, and a nitrogenous base.

Explanation: The passage clearly outlines that a nucleotide, the fundamental unit of DNA, consists of three components: a phosphate group, a sugar molecule, and a nitrogenous base. This definition is essential for understanding the building blocks of DNA and how they contribute to its overall structure.

3. Answer: B. Genetic inheritance determines the traits of organisms.

Explanation: The statement refers to the role of genetic inheritance in determining the traits of living organisms. By highlighting that DNA is replicated and passed on to offspring, the professor emphasises how genetic information influences the characteristics that are observed in future generations.

4. Answer: B. Appreciative.

Explanation: The professor expresses an appreciative attitude towards the complexity of DNA, noting its remarkable structure and vital role in genetic inheritance. This appreciation is evident in the way he describes the intricate details of DNA's double helix and its significance in shaping the traits of living organisms.

5. Answer: A. To highlight the discovery of DNA's structure.

Explanation: The mention of James Watson and Francis Crick serves to underscore their pivotal role in elucidating the structure of DNA in 1953. By referencing their discovery, the professor provides context for understanding the significance of the double helix in the study of genetics.

6. Answer: C. DNA plays a crucial role in determining traits and inheritance

Explanation: The passage implies that DNA is fundamental to the characteristics and inheritance of traits in all living organisms. By discussing how genes, which are segments of DNA, dictate various traits, the professor highlights the essential role that DNA plays in the biological processes of life.

Want to continue with the TOEFL Listening preparation? We've created different practice tests that mimic the actual exam format to boost your confidence and self-assurance, especially on the test day.

So, let's take a step forward and check out a few more practice tests to level up your listening skills!

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