Biology

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Review Biology related questions and content

What organisms cannot produce energy without oxygen?

  • A. Obligate anaerobes.
  • B. Strict aerobes.
  • C. Facultative aerobes.
  • D. Facultative anaerobes.
Correct Answer: B

Rationale: Correct Answer: B - Strict aerobes

Rationale:
1. Strict aerobes require oxygen for energy production through aerobic respiration.
2. Without oxygen, strict aerobes cannot generate energy efficiently.
3. Obligate anaerobes (A) do not require oxygen and can produce energy through anaerobic respiration.
4. Facultative aerobes (C) can switch between aerobic and anaerobic respiration based on oxygen availability.
5. Facultative anaerobes (D) can generate energy through both aerobic and anaerobic respiration, depending on the environment.

Summary:
Strict aerobes are organisms that solely rely on oxygen for energy production. Other choices (A, C, D) can adapt their energy production methods based on oxygen availability.

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Phenotype refers to the.................... of an individual.

  • A. Genetic makeup
  • B. Actual physical appearance
  • C. Recessive alleles
  • D. None of the above
Correct Answer: B

Rationale: Phenotype refers to the observable physical characteristics of an individual, such as hair color, eye color, and height. It is the result of the interaction between an individual's genetic makeup (genotype) and environmental influences. Therefore, the correct answer is B, 'Actual physical appearance.' The term 'genetic makeup' (Choice A) refers to genotype, which is the actual set of genes an individual carries. 'Recessive alleles' (Choice C) are specific forms of genes that are masked by dominant alleles in heterozygous individuals and do not directly define the phenotype. 'None of the above' (Choice D) is incorrect as phenotype does refer to something among the given choices, which is the actual physical appearance.

Which cell organelle can be functionally compared to the door of a house?

  • A. Nucleus.
  • B. Endoplasmic reticulum.
  • C. Cell membrane.
  • D. Cytoplasm.
Correct Answer: C

Rationale:

Enzymes are typically...

  • A. Fats
  • B. Proteins
  • C. Sugars
  • D. Neurons
Correct Answer: B

Rationale: Enzymes are typically proteins, not fats, sugars, or neurons. Proteins are large molecules made up of amino acids and are the most common type of enzymes. Enzymes play a crucial role in catalyzing biochemical reactions in living organisms by speeding up these reactions without being consumed in the process.

Which term means a group of similar cells combined to perform a common function?

  • A. Tissue
  • B. Organism
  • C. System
  • D. Organ
Correct Answer: A

Rationale: The correct answer is 'Tissue.' Tissue is a group of similar cells that work collectively to carry out a specific function. These specialized cells combine to form tissues, which further combine to create organs. Organs then collaborate within systems in the body to maintain balance (homeostasis) and perform various functions such as digestion, circulation, and respiration.

Which term means alternate forms of a gene for the same trait?

  • A. Phenotypes.
  • B. Genotypes
  • C. Alleles.
  • D. Gametes.
Correct Answer: C

Rationale:

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