OAT Biology Practice Test 2023 Questions and Answer Try our free Optometry Admission Test (OAT) Biology online quiz for better OAT test prep. Biology is a topic area integral to mastery of the Survey of Natural Sciences portion of the OAT.
The biology review in this Practice Test begins with a chapter on a strategy that tests your knowledge of that content and reviews the quiz to find any missing knowledge gaps. The biology knowledge you need for the DAT encompasses a wide variety of topics in the categories of cell and molecular biology, diversity of life, vertebrate anatomy and physiology, developmental biology, genetics and evolution, and ecology and behavior.
Mastering biology on the OAT means not only memorizing biology vocabulary and facts but also learning to integrate your knowledge, make connections, and otherwise approach the multiple-choice questions in the Biology subtest and the entire Survey of Natural Sciences section in the best way possible.
OAT Biology Practice Test 2023
Biology content appears in the Survey of Natural Sciences section, which contains the Biology, General Chemistry, and Organic Chemistry subtests. In the real test, the Survey of Natural Sciences has a total of 100 questions that must be completed in 90 minutes. Questions 1–40 are always related to biology,
Test Name | OAT Practice Test 2023 |
Test Purpose | Admission into optometry schools |
Subject | Survey of Natural Sciences |
Sub Test | Biology |
Sample Questions | 40 |
Time Limit | N/A |
Quiz-summary
0 of 40 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
Information
Optometry Admissions Test – Survey of Natural Sciences
OAT Biology Test
Total Questions: 40
Time Limit: 30 Minutes
Click on the “Start Quiz” Button to start the test
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 40 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- Answered
- Review
-
Question 1 of 40
1. Question
1 pointsAll of the following are components of the Cell Theory EXCEPT the idea that
Correct
Incorrect
-
Question 2 of 40
2. Question
1 pointsWhich of the following activities occurs in the Golgi apparatus?
Correct
Incorrect
-
Question 3 of 40
3. Question
1 pointsA researcher treats a solution containing animal cells with ouabain, a substance that interferes with the Na+ /K+ pump embedded in the cell membrane and causes the cell to lyse. Which of the following statements best explains ouabain’s mechanism of action?
Correct
Incorrect
-
Question 4 of 40
4. Question
1 pointsProkaryotic cells and eukaryotic animal cells both have
Correct
Incorrect
-
Question 5 of 40
5. Question
1 pointsWhich of the following is NOT true about pyrimidines and purines?
Correct
Incorrect
-
Question 6 of 40
6. Question
1 pointsWhich model of DNA replication describes one parental strand and one new strand of DNA making up each new helix?
Correct
Incorrect
-
Question 7 of 40
7. Question
1 pointsIn glucose catabolism
Correct
Incorrect
-
Question 8 of 40
8. Question
1 pointsFatty acids enter the degradative pathway in the form of
Correct
Incorrect
-
Question 9 of 40
9. Question
1 pointsWhich of the following is LEAST likely to occur during oxygen debt?
Correct
Incorrect
-
Question 10 of 40
10. Question
1 pointsWhich of the following is true of the dark reactions of photosynthesis?
Correct
Incorrect
-
Question 11 of 40
11. Question
1 pointsA woman with blood genotype IAi and a man with blood genotype IBi have two children, both type AB. What is the probability that a third child will be blood type AB?
Correct
Incorrect
-
Question 12 of 40
12. Question
1 pointsIn humans, the allele for black hair (B) is dominant to the allele to brown hair (b), and the allele for curly hair (C) is dominant to the allele for straight hair (c). When a person of unknown genotype is crossed against a straight- and brown-haired individual, the phenotypic ratio is
25% curly black hair
25% straight black hair
25% curly brown hair
25% straight brown hairWhat is the genotype of the unknown parent?
Correct
Incorrect
-
Question 13 of 40
13. Question
1 pointsAssuming classical Mendelian inheritance, how can one differentiate between a homozygous dominant individual and one who is heterozygous for the dominant trait?
Correct
Incorrect
-
Question 14 of 40
14. Question
1 pointsIf a male hemophiliac (XhY) is crossed with a female carrier of both color blindness and hemophilia (Xc Xh ), what is the probability that a female child will be phenotypically normal?
Correct
Incorrect
-
Question 15 of 40
15. Question
1 pointsHomologous structures are
Correct
Incorrect
-
Question 16 of 40
16. Question
1 pointsAs the ocean became saltier, whales and fish independently evolved mechanisms to maintain the concentration of salt in their bodies. This can be explained by
Correct
Incorrect
-
Question 17 of 40
17. Question
1 pointsWhich of the following was NOT a belief of Darwin’s?
Correct
Incorrect
-
Question 18 of 40
18. Question
1 pointsThe proposed “primordial soup” was composed of organic precursor molecules formed by interactions between all of the following elements EXCEPT
Correct
Incorrect
-
Question 19 of 40
19. Question
1 pointsWhat is the role of histamine in the immune response?
Correct
Incorrect
-
Question 20 of 40
20. Question
1 pointsWhat type of cell responds to activated MHC II complexes?
Correct
Incorrect
-
Question 21 of 40
21. Question
1 pointsWhich of the following statements best characterizes an axon?
Correct
Incorrect
-
Question 22 of 40
22. Question
1 pointsThe all-or-none law states that
Correct
Incorrect
-
Question 23 of 40
23. Question
1 pointsWhen the potential across the axon membrane is more negative than the normal resting potential, the neuron is said to be in a state of
Correct
Incorrect
-
Question 24 of 40
24. Question
1 pointsChemical X is found to denature all enzymes in the synaptic cleft. What are the effects on acetylcholine if chemical X is added to the cleft?
Correct
Incorrect
-
Question 25 of 40
25. Question
1 pointsDuring muscle contraction, which of the following regions decrease(s) in length?
Correct
Incorrect
-
Question 26 of 40
26. Question
1 pointsRegion 1 refers to
Correct
Incorrect
-
Question 27 of 40
27. Question
1 pointsWhen a muscle is attached to two bones, usually only one of the bones moves. The part of the muscle attached to the stationary bone is referred to as
Correct
Incorrect
-
Question 28 of 40
28. Question
1 pointsThis Question is refer to the following types of muscle:
I. Cardiac muscle
II. Skeletal muscle
III. Smooth muscleWhich type of muscle has strong, forceful contractions?
Correct
Incorrect
-
Question 29 of 40
29. Question
1 pointsWhich of the following statements concerning growth hormone is NOT true?
Correct
Incorrect
-
Question 30 of 40
30. Question
1 pointsWhich of the following correctly describes the order of maturation of a sperm?
Correct
Incorrect
-
Question 31 of 40
31. Question
1 pointsWhich of the following developmental stages has the greatest nuclear-to-cytoplasmic material ratio?
Correct
Incorrect
-
Question 32 of 40
32. Question
1 pointsWhat is NOT true about niches?
Correct
Incorrect
-
Question 33 of 40
33. Question
1 pointsSelect the proper progression of the taxonomy classification system.
Correct
Incorrect
-
Question 34 of 40
34. Question
1 pointsWhich is NOT a type of worm?
Correct
Incorrect
-
Question 35 of 40
35. Question
1 pointsRed-green color blindness is an X-linked trait. What is the probability that a mother that is heterozygous for this trait and a father with this trait will have affected children?
Correct
Incorrect
-
Question 36 of 40
36. Question
1 pointsA population of pea plants has 25% dwarf plants and 75% tall plants. The tall
allele, T, is dominant to dwarf (t). What percentage of tall plants is heterozygous?Correct
Incorrect
-
Question 37 of 40
37. Question
1 pointsAuxin stimulates stem elongation and is involved in the process of phototropism. If plants bend toward a light source, in which region of the plant is auxin most likely to be found?
Correct
Incorrect
-
Question 38 of 40
38. Question
1 pointsHemophilia is a sex-linked trait. From which parent(s) did an affected boy inherit the trait?
Correct
Incorrect
-
Question 39 of 40
39. Question
1 pointsWhich is NOT a region of a marine biome?
Correct
Incorrect
-
Question 40 of 40
40. Question
1 pointsWhich of the following is NOT true about the nitrogen cycle?
Correct
Incorrect