MDCAT Biodiversity MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
2
Selected Topics
1
Available MCQs
549
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 549 total questions. Test will draw 50 shuffled MCQs.
Sample Biodiversity MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Viral Classification
1. Viruses can bud from:
- A. Rough endoplasmic reticulum
- B. Golgi complex
- C. Nuclear envelop
- D. All listed options
View answer and explanation
Answer: D. All listed options
This question tests how enveloped viruses acquire their envelope. Enveloped viruses obtain their lipid envelope by budding through host cell membranes, and different viruses bud through different membranes: some through the plasma membrane, others through the endoplasmic reticulum, the Golgi complex, or the nuclear membrane (for example, herpesviruses bud through the nuclear membrane). Since budding can occur at all of these membranes, all of the listed options are correct.
AIDS & HIV
2. Which body fluid can transmit HIV?
- A. sweat
- B. blood
- C. saliva during ordinary conversation
- D. tears
View answer and explanation
Answer: B. blood
HIV can be transmitted through infected blood; casual exposure to sweat, tears, or saliva does not transmit it.
Viral Classification
3. A virion is a:
- A. Complete extracellular virus particle
- B. Viral lysozyme
- C. An empty capsid only
- D. A single viral gene
View answer and explanation
Answer: A. Complete extracellular virus particle
A virion is a complete virus particle outside a host cell, with its genome and structural components.
About this unit
MDCAT Biodiversity — Unit 1
751 practice MCQs covering Viral Classification, AIDS & HIV. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Biodiversity practice
How many Biodiversity MCQs are available on DIFF. MDCAT?
The current Biodiversity question bank contains 751 practice MCQs across 2 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Biodiversity quiz cover?
The selectable topics are Viral Classification, AIDS & HIV. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Biodiversity test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Biodiversity quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Biodiversity MCQs to improve?
Start with a short tutor drill on one of these topics: Viral Classification, AIDS & HIV. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.