All Tests Available for Free.

info@examgates.com

support@examgates.com

info@examgates.com

support@examgates.com

/
TEAS 7 Science Custom TEAS Science Practice Test 1 In a plant in which fuzzy leaves (F) are...

In a plant in which fuzzy leaves (F) are dominant over smooth leaves (f), which of the following crosses will produce only offspring with smooth leaves?

A. Ff x ff

B. Ff x Ff

C. FF x FF

D. ff x ff

Answer Explanation:

Crossing is the breeding of parents to produce an offspring. Given that f is a recessive allele of smooth leaves while F is the dominant allele of fuzzy leaves. Therefore, where there is F crossing with f, the offspring will have fuzzy leaves over smooth one.
Therefore, for an offspring to have smooth leaves, ff and ff must cross to produce an offspring with smooth leaves.

Therefore, the Correct Answer is D.

More Questions on TEAS 7 Science

  • Q #1: Which of the following are used to determine a person’s DNA sequence?

    A. Genes

    B. Enzymes

    C. Hormones

    D. Blood types

    Answer Explanation

    A gene is the basic physical and functional unit of heredity and it is the DNA that make up genes. Enzymes are biological catalysts that speed up metabolic and cellular reactions in our bodies. Hormones are responsible for controlling the action of certain cells or organs in our bodies. Blood types are of four types, A, B, AB, and O.

  • Q #2: The Life Cycle of HIV Which of the following allows the AIDS virus, which contains RNA, to insert viral DNA into the DNA of a host T-cell after the AIDS virus enters the cell?

    A. Receptor proteins located on the surface of the virus

    B. The protein that makes up the capsid of the virus

    C. Reverse transcriptase, an enzyme encoded by the virus

    D. The phospholipids found on the envelope of the virus

    Answer Explanation

    The AIDS virus (HIV virus) is Class VI or Group VI in the Baltimore Classification. Based on the Baltimore Classification, this specifically involves the reverse transcriptase enzyme and it is encoded by the virus.

    This is the enzyme that will produce DNA molecules from the viral RNA. This is the mechanism involved where it will use the reverse transcriptase enzyme to insert viral DNA into the genetic material of the host cell.

  • Q #3: Lithium has an atomic number of 3 and a mass number of 7. Which of the following is the number of neutrons in a lithium atom?

    A. 4

    B. 7

    C. 12

    D. 3

    Answer Explanation

    The atom is identified by the atomic number in the periodic table. The atomic number is equal to the number of protons and mass number is the sum of the number of protons and neutrons in the nucleus of an atom. Thus, to find how many neutrons are in lithium atom we use the formula below.

    Mass number = number of protons + number of neutrons.

    Letting n be number of neutrons in the lithium atom, we have

    7=3+n

    Rearranging the above equation

    3+n=7

    n=7-3

    n=4

    Thus, lithium atom has 4 neutrons.

Free Access on TEAS 7 Exams and Study Notes
  • Access to all TEAS 7 Exams
  • Performance Tracking and Analysis
  • Well Documented and Explained Questions and Answers
  • 2000+ Questions and Correct Answers: Answers Well Explained
  • Libary of Detailed StudyNotes
  • Topical Questions and Answers on Examinable topics
Join Now

TEAS 7 Exams (Q&A)

TEAS 7 Study Notes

TEAS 7 Topical Tests

examgates

TEAS 7 Study Guides

Quick Links

Refer a Friend

Refer a friend and claim free unlimited access

Shape
Terms of Service Privacy Policy Sitemap Security

© 2025 ExamGates Made with by ExamGates