Biology: Connective Tissue & Prokaryotic Cells

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Questions and Answers

What is a defining feature of connective tissue?

Absence of blood vessels

Presence of membrane-bound organelles

Presence of a nucleus

Extracellular matrix (ECM) (correct)

Which statement correctly describes prokaryotic cells?

They are often multicellular organisms.

They have a true nucleus.

They contain multiple membrane-bound organelles.

They possess a nucleoid region with circular DNA. (correct)

Which domains of life are prokaryotes classified under?

Bacteria and Eukarya

Archaea and Bacteria (correct)

Archaea and Eukarya

Bacteria and Fungi

What characteristic distinguishes Archaea from Bacteria?

Archaea and Eukarya share similar metabolic pathways. Signup and view all the answers

What mode of cell division do Archaea use?

Binary fission or budding Signup and view all the answers

Which feature do both Archaea and Eukaryotes share?

They start translation with methionine. Signup and view all the answers

What is true about the structural characteristics of Archaea?

They only have one chromosome. Signup and view all the answers

Why are some Archaea considered extremophiles?

They thrive in harsh environmental conditions. Signup and view all the answers

Which statement incorrectly describes the classification of Archaea?

Archaea are more similar to bacteria than to eukaryotes in metabolic pathways. Signup and view all the answers

Which of the following is not an example of connective tissue?

Nerve tissue Signup and view all the answers

What distinguishes the structure of prokaryotic cells from eukaryotic cells?

Prokaryotic cells have a nucleoid region with circular DNA. Signup and view all the answers

Which characteristic is unique to Archaea compared to Bacteria?

Chemosynthetic energy generation. Signup and view all the answers

Which process is primarily used by Archaea for cell division?

Budding or binary fission Signup and view all the answers

In what way are Archaea and Eukaryotes hypothesized to be related?

Both share a common ancestor and begin translation with methionine. Signup and view all the answers

Which of the following statements about Archaea and their energy sources is incorrect?

All Archaea are known to be extremophiles. Signup and view all the answers

Which feature of connective tissue primarily enables it to serve as a support structure?

Presence of a complex extracellular matrix. Signup and view all the answers

Which statement about the domains of life is accurate?

Prokaryotic cells can only be found in Archaea and Bacteria domains. Signup and view all the answers

Study Notes

Connective Tissue

Supports and frames epithelial cells
Provides structural support
Examples include bone, cartilage, tendons, ligaments, adipose tissue, and blood
Defined by the presence of an extracellular matrix (ECM)

Prokaryotic Cells

Lack membrane-bound organelles
Lack a nucleus; have a nucleoid region with circular DNA
Organised into three domains: Archaea, Bacteria, and Eukarya
Prokaryotes are only found in Archaea and Bacteria
Initially, Archaea and Bacteria were grouped into Monera
Archaea are single-celled; appear similar to bacteria but have more similar genes to eukaryotes
Historically considered extremophiles (adapted to harsh environments)
Can utilize alternative energy sources (e.g., inorganic compounds, sulfur and nitrogen)
Some can survive in less extreme conditions (e.g., human body)
Some are photosynthetic; others are chemosynthetic
Hypothesised common ancestor with eukaryotes (e.g., start translation with methionine)
Share similar RNA polymerases and DNA association with histones (though archaea only have one chromosome); both use similar amino acids in translation
Reproduce via binary fission or budding; share similar structural features with bacteria
Resistant to many antibiotics

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Description

This quiz covers essential topics in biology, focusing on connective tissues and prokaryotic cells. It explores the structural roles of connective tissues and distinctive characteristics of prokaryotic organisms, including their lack of membrane-bound organelles and the domains they belong to. Test your understanding of these foundational biological concepts!