Biology Practice Question and Answer

Q:

____forms a common passage for both urine and sperms in human males.

1504 1

  • 1
    Oviduct
    Correct
    Wrong
  • 2
    Urethra
    Correct
    Wrong
  • 3
    Ureter
    Correct
    Wrong
  • 4
    Vas deferens
    Correct
    Wrong
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Answer : 2. "Urethra"
Explanation :

(B) Urethra

The urethra is the structure that forms a common passage for both urine and sperm in human males. It connects the urinary bladder to the external opening and serves as the channel through which urine and semen pass out of the body. The other options—Oviduct, Ureter, and Vas deferens—are not involved in the passage of urine in males. Oviduct is part of the female reproductive system, while the ureter carries urine from the kidneys to the bladder, and the vas deferens is a duct that transports sperm from the testes to the urethra.

Q: Which of the following is not a prime cost? 2075 0

  • 1
    Supervisor's wages
    Correct
    Wrong
  • 2
    Assembly line wages
    Correct
    Wrong
  • 3
    Machine operators wages
    Correct
    Wrong
  • 4
    Direct labor wages
    Correct
    Wrong
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Answer : 1. "Supervisor's wages"
Explanation :

Answer: A) Supervisor's wages Explanation: The prime cost calculates the use of raw materials and direct labor, but does not factor in indirect expenses, such as advertising and administrative costs. Supervisor's wages doesn;t come under prime cost.

Q:

What plant breeders should they do to produce an immunogenic species?

928 0

  • 1
    Selection
    Correct
    Wrong
  • 2
    Mutation
    Correct
    Wrong
  • 3
    Crop production
    Correct
    Wrong
  • 4
    Hybridization
    Correct
    Wrong
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Answer : 1. "Selection"

Q: Which of the following is true of kinetochores? 3656 0

  • 1
    They are the primary centrosome structures that maintain the attachment of the sister chromatids prior to mitosis.
    Correct
    Wrong
  • 2
    They are the sites at which microtubules attach to chromosomes.
    Correct
    Wrong
  • 3
    They are located at the center of the centrosome and organize tubulin into spindle fibers.
    Correct
    Wrong
  • 4
    They cross at the cell's equator and move against each other, causing the cell to elongate.
    Correct
    Wrong
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Answer : 2. "They are the sites at which microtubules attach to chromosomes."
Explanation :

Answer: B) They are the sites at which microtubules attach to chromosomes. Explanation: They are the sites at which microtubules attach to chromosomes.

Q: What process immediately preceeded protein synthesis at the ribosome? 1746 0

  • 1
    transcription
    Correct
    Wrong
  • 2
    replication
    Correct
    Wrong
  • 3
    translation
    Correct
    Wrong
  • 4
    duplication
    Correct
    Wrong
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Answer : 1. "transcription"
Explanation :

Answer: A) transcription Explanation: Protein synthesis at the ribosome is immediately preceeded by the transcription process.

Q: In what organelle does cellular respiration take place? 1236 0

  • 1
    Cytoplasm
    Correct
    Wrong
  • 2
    Ribosomes
    Correct
    Wrong
  • 3
    Mitochondria
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 3. "Mitochondria"
Explanation :

Answer: C) Mitochondria Explanation: Cellular respiration is the multi-step process that creates energy from nutrients and food molecules. It begins in the cytoplasm of the cell, with the mitochondria functioning as the main organelle where the rest of the process continues and finishes. During respiration, glycolysis occurs in the cytoplasm of the cell.

Q:

It causes clotting of blood – 

1058 0

  • 1
    Thrombin
    Correct
    Wrong
  • 2
    Hemoglobin
    Correct
    Wrong
  • 3
    Pectin
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 1. "Thrombin "
Explanation :

The substance that causes the clotting of blood is:

(A) Thrombin

Thrombin is an enzyme that plays a crucial role in the blood clotting process. It is responsible for converting fibrinogen, a soluble plasma protein, into insoluble fibrin threads. These fibrin threads form a mesh that helps in the clotting of blood, particularly at the site of injury or wound. Therefore, option (A) Thrombin is the correct answer.

Q:

How many types of lavaks are based on color?

4786 0

  • 1
    2
    Correct
    Wrong
  • 2
    3
    Correct
    Wrong
  • 3
    4
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 2. "3"

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