Тест: Fundamentals of Biological Diversity — 12 въпроса

1. What is the primary function of the cytoskeleton?

A. To modify and package proteins

B. To produce ATP for the cell

C. To provide structural support and facilitate transport

D. To synthesize proteins

Answer: (C)

Обяснение

The cytoskeleton's primary role is to provide structural support and facilitate intracellular transport and cell movement, as explicitly stated in the source.

2. What does enzyme classification primarily depend on?

A. The specific reaction they catalyze

B. The size of the enzyme molecule

C. The temperature at which they operate

D. The source organism of the enzyme

Answer: (A)

Обяснение

Enzymes are classified based on the type of reaction they catalyze, such as oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases.

3. Which statement matches the topic "Photosynthesis: Pigments and Electron Transport"?

A. Kingdom Monera : A kingdom consisting solely of bacteria, which are the most abundant microorganisms and inhabit extreme environments, classified based on cell structure and morphology

B. Animalia : Multicellular, heterotrophic eukaryotic organisms that lack cell walls and primarily obtain nutrition through holozoic means

C. Male : A reproductive sex that produces small motile gametes (sperm) involved in sexual reproduction

D. Mycoplasma : Bacterial organisms that completely lack a cell wall, are the smallest living cells known, can survive without oxygen, and many species are pathogenic

Answer: (C)

Обяснение

This statement comes directly from the course section dedicated to this topic: Male : A reproductive sex that produces small motile gametes (sperm) involved in sexual reproduction.

4. What is the primary role of pollination in flowering plants?

A. To produce ovum in the ovary

B. To transfer pollen grains from anther to stigma

C. To facilitate seed dispersal

D. To develop the fruit after fertilization

Answer: (B)

Обяснение

Pollination is the transfer of pollen grains from anther to stigma, enabling fertilization, which is the key function of pollination.

5. What is a population in ecological terms?

A. A community of various species interacting with each other

B. A group of different species living together in an ecosystem

C. A collection of individuals of the same species in a specific area

D. All organisms living in a particular habitat

Answer: (C)

Обяснение

A population is a group of individuals of the same species living in a well-defined geographical area, sharing/competing for similar resources, and potentially interbreeding.

6. What is the primary role of glycolysis in cellular respiration?

A. To generate a proton gradient for ATP synthesis

B. To split water molecules in the mitochondria

C. To oxidize acetyl-CoA to CO2

D. To produce ATP and NADH from glucose

Answer: (D)

Обяснение

Glycolysis is described as a pathway that breaks down glucose into pyruvate, producing ATP and NADH, which are essential for energy supply in cells.

7. What is DNA replication?

A. The insertion of recombinant DNA into a host cell

B. The process of copying genetic information from DNA to RNA

C. The process of copying genetic information from RNA to DNA

D. The process of copying genetic information from DNA to DNA during cell division

Answer: (D)

Обяснение

DNA replication is the process of copying genetic information from DNA to DNA during cell division, involving enzymes like helicase and DNA polymerase.

8. What is the primary role or function of viruses, viroids, prions, and lichens?

A. Viruses cause plant diseases, viroids replicate in animals, prions are used in vaccines, lichens decompose organic matter.

B. Viruses are involved in photosynthesis, viroids are used in genetic engineering, prions repair damaged proteins, lichens are a food source for animals.

C. Viruses produce energy for cells, viroids store genetic information, prions build cellular structures, lichens generate oxygen.

D. Viruses replicate within host cells, viroids cause plant diseases, prions induce abnormal protein folding, lichens form symbiotic associations.

Answer: (D)

Обяснение

Viruses replicate within host cells, viroids cause plant diseases, prions induce abnormal protein folding, lichens form symbiotic associations, as supported by the source.

9. What is the primary function of vascular bundles in leaves?

A. Transport of water, nutrients, and photosynthates

B. Absorption of sunlight for photosynthesis

C. Protection of leaf tissues from damage

D. Regulation of gas exchange with the atmosphere

Answer: (A)

Обяснение

Vascular tissue in plants is responsible for the transport of water, nutrients, and photosynthates, which is the primary function of vascular bundles in leaves.

10. What is the main purpose of the Five Kingdom System introduced by R.H. Whittaker in 1969?

A. To group organisms solely by their habitat and environmental adaptations

B. To classify organisms based on genetic sequences

C. To organize organisms based on cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships

D. To categorize organisms according to their ecological roles

Answer: (C)

Обяснение

The Five Kingdom System classifies organisms based on cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships, as explicitly stated in the source.

11. What is the primary function of auxins in plants?

A. Promote cell division and delay leaf senescence

B. Stimulate seed germination and stress responses

C. Stimulate stem elongation and flowering

D. Promote cell elongation, apical dominance, and root initiation

Answer: (D)

Обяснение

Auxins promote cell elongation, apical dominance, and root initiation in plants, as stated in the source. The other options describe functions of different hormones or general roles not specifically attributed to auxins in this context.

12. What is a common component of the second messenger system in hormone signaling?

A. Neurotransmitters

B. Hormone-specific enzymes

C. Cyclic AMP (cAMP)

D. Insulin receptors

Answer: (C)

Обяснение

The second messenger system transduces hormone signals inside target cells, often involving cyclic AMP (cAMP) as a mediator.