QCM : Fundamentals of Biology and Biotechnology — 7 questions

Questions et réponses du QCM

1. Which key property distinguishes mitochondria within the cell?

They synthesize proteins for the cell
They control the genetic activities of the cell
They regulate what substances pass through the cell membrane
They are responsible for energy production through cellular respiration

They are responsible for energy production through cellular respiration

Explication

Mitochondria are described as the powerhouses of the cell because they are the sites of cellular respiration, where ATP energy is produced by breaking down nutrients. The other options describe functions of the nucleus (control activities), ribosomes (protein synthesis), and the cell membrane (regulation of substances), which are not the primary distinguishing features of mitochondria.

2. According to the course outline sequence, which biological concept was established second in the study of living organisms?

The understanding of genetic inheritance
The classification of tissues in plants and animals
The systems of plants and animals
The structure and functions of cells

The structure and functions of cells

Explication

The course outline first mentions 'Cell structure and functions' and then 'Plant and animal tissues,' indicating that the understanding of cell structure and functions was established before the study of tissues. Therefore, the second concept in this sequence is the understanding of cell structure and functions.

3. How does the proper functioning of the circulatory system in animals impact the organism?

It reduces the efficiency of gas exchange in the lungs.
It hampers the digestion process by affecting enzyme secretion.
It enhances the distribution of nutrients and removal of wastes, supporting overall health.
It causes a decrease in energy production leading to fatigue.

It enhances the distribution of nutrients and removal of wastes, supporting overall health.

Explication

The circulatory system's primary role is to transport nutrients, gases, and wastes, which directly supports the organism's health. Proper functioning ensures that vital substances are delivered and metabolic wastes are removed, maintaining homeostasis and overall well-being.

4. What is the primary function of a gene in genetics and inheritance?

To produce traits directly in the organism
To control all cellular activities in the cell
To carry the instructions for the development of specific traits or characteristics
To serve as a structural component of chromosomes

To carry the instructions for the development of specific traits or characteristics

Explication

Genes are the basic units of heredity that carry instructions for developing specific traits. They do not produce traits directly, control all cell activities, or serve as structural components; instead, they store information that influences trait development.

5. What does the term 'natural selection' mean in the context of evolution?

A mechanism by which individuals with beneficial traits are more likely to survive and reproduce, leading to changes in the population over generations
A process where organisms develop new traits during their lifetime due to environmental changes
A method used by scientists to artificially breed organisms with specific traits for agriculture or research
The process of organisms choosing mates based on desirable traits to pass on those traits to offspring

A mechanism by which individuals with beneficial traits are more likely to survive and reproduce, leading to changes in the population over generations

Explication

Natural selection is a process that leads to evolution, where individuals with advantageous traits are more likely to survive and reproduce, passing those traits on to their offspring. Over time, this causes the traits to become more common in the population, resulting in gradual evolutionary change.

6. How should a biologist proceed to accurately classify an unknown organism they have discovered in the field?

Observe its physical features and compare them with known species, then assign it to a genus and species following the binomial nomenclature system.
Create a new kingdom for the organism if it does not fit into known categories, ignoring the hierarchical system.
Use only the organism's habitat and ecological role to classify it, without examining its physical or genetic features.
Sequence its entire genome immediately and publish the genetic data without comparing it to existing classifications.

Observe its physical features and compare them with known species, then assign it to a genus and species following the binomial nomenclature system.

Explication

The correct approach involves observing the organism's characteristics and comparing them with existing species to determine its classification within the hierarchical system and assign a scientific name using binomial nomenclature. This method aligns with the principles of taxonomy described in the source.

7. What is the system called that assigns two Latinized words to each species, with the first indicating the genus and the second the species?

Binomial nomenclature
Genetic coding
Taxonomic classification
Molecular tagging

Binomial nomenclature

Explication

The system described assigns two Latinized words to each species, with the first indicating the genus and the second the species. This is known as binomial nomenclature, a universal naming system for species.

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Mémorisez les réponses avec 13 flashcards sur Fundamentals of Biology and Biotechnology.

Cell membrane — role?

Selective barrier maintaining homeostasis

Nucleus — function?

Contains genetic material, controls activities

Mitochondria — function?

Produce ATP via cellular respiration

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