Biology

Biology Related

Review Biology related questions and content

What is the first step in the conversion of glucose to pyruvate?

  • A. Glycolysis
  • B. Krebs cycle
  • C. Electron transport chain
  • D. Aerobic respiration
Correct Answer: A

Rationale: The correct answer is A: Glycolysis. Glycolysis is the initial step in the conversion of glucose to pyruvate and occurs in the cytoplasm of the cell. During glycolysis, glucose is enzymatically broken down into pyruvate, generating ATP and NADH as energy carriers. Following glycolysis, the Krebs cycle, electron transport chain, and aerobic respiration continue the breakdown of pyruvate to produce more ATP through oxidative phosphorylation and complete the cellular respiration process.

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In binomial nomenclature, what is the second part of an organismā€™s scientific name?

  • A. species
  • B. phylum
  • C. population
  • D. kingdom
Correct Answer: A

Rationale: In binomial nomenclature, the scientific name of an organism consists of two parts: the genus name (first part) and the species name (second part). The second part, 'species,' helps differentiate between different organisms within the same genus. This specific naming system is critical for accurate identification and classification of organisms. Hence, the correct answer is 'species.'

What part of a light microscope is used to hold the slide in place?

  • A. Stage clips
  • B. Rack stop.
  • C. Base.
  • D. Arm.
Correct Answer: A

Rationale:

Anaerobic respiration happens in.............because..............

  • A. Animals; they primarily rely on aerobic respiration
  • B. Plants; they can perform photosynthesis
  • C. Bacteria; they live in environments with low oxygen levels
  • D. None of the above
Correct Answer: C

Rationale: Anaerobic respiration occurs in bacteria because they live in environments with low oxygen levels. In the absence of oxygen, these organisms utilize anaerobic respiration to generate energy. Animals and plants primarily rely on aerobic respiration, which requires oxygen to produce energy efficiently. Plants do not lack sunlight; they can perform photosynthesis to derive energy. Animals do require energy but predominantly use aerobic respiration when oxygen is available.

Which antioxidant is identified as a healing vitamin?

  • A. A
  • B. D.
  • C. K
  • D. E
Correct Answer: D

Rationale:

What type of bond in the DNA nucleotide base holds the strands together?

  • A. Hydrogen
  • B. Sodium chloride
  • C. Copper
  • D. Potassium bromide
Correct Answer: A

Rationale: Hydrogen bonds are the type of bonds that hold the two strands of DNA together by connecting complementary nitrogenous bases (adenine with thymine and cytosine with guanine). These weak bonds allow the DNA strands to separate during replication and transcription while providing stability to the overall structure of the DNA molecule.

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