Plant and Animal Tissues Overview

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Questions and Answers

What stabilizes the primary level of protein structure?

  • Ionic interactions
  • Hydrogen bonds
  • Disulfide bridges
  • Peptide bonds (correct)

Which of the following describes the secondary level of protein structure?

  • The aggregation of multiple polypeptide chains
  • Formation of É‘-helices and β-pleated sheets (correct)
  • The three-dimensional folding of a polypeptide chain
  • The sequence of amino acids in a polypeptide

Which type of bonding is primarily responsible for stabilizing the tertiary structure of proteins?

  • Ionic bonding
  • Peptide bonds
  • Multiple types including bonds and interactions (correct)
  • Hydrogen bonding

Which atomic elements are primarily found in proteins?

<p>Carbon, hydrogen, oxygen, and nitrogen (A)</p> Signup and view all the answers

What defines the primary structure of a protein?

<p>The unique sequence of amino acids (C)</p> Signup and view all the answers

What type of cells supports sieve-tube elements in angiosperms?

<p>Companion cells (A)</p> Signup and view all the answers

Which of the following components are found in the xylem?

<p>Tracheids (D)</p> Signup and view all the answers

What is the primary function of the phloem?

<p>Transport sugars (A)</p> Signup and view all the answers

What are the two types of tracheary elements identified in the xylem?

<p>Vessel elements and tracheids (D)</p> Signup and view all the answers

What molecular formula do monosaccharides share?

<p>(CH2O)n (C)</p> Signup and view all the answers

Which nitrogenous base is found in RNA but not in DNA?

<p>Uracil (C)</p> Signup and view all the answers

What is the primary role of messenger RNA (mRNA)?

<p>To carry genetic information from the nucleus to ribosomes (A)</p> Signup and view all the answers

How many types of RNA are mentioned, and which one is a component of a ribosome?

<p>Three; rRNA (C)</p> Signup and view all the answers

Which of the following statements is true about the structure of RNA?

<p>RNA has a pentose sugar called ribose. (C)</p> Signup and view all the answers

What is the function of transfer RNA (tRNA) during protein synthesis?

<p>To bring amino acids to the ribosome (B)</p> Signup and view all the answers

In the context of translation, what is a codon?

<p>A sequence of three nucleotides (A)</p> Signup and view all the answers

Which process involves the use of ribosomal RNA (rRNA)?

<p>Translation (B)</p> Signup and view all the answers

What is the primary function of blood as a specialized connective tissue?

<p>To transport oxygen, nutrients, and wastes (A)</p> Signup and view all the answers

What occurs at the start codon during protein synthesis?

<p>It marks the beginning of translation. (B)</p> Signup and view all the answers

Which of the following accurately describes bone tissue?

<p>A specialized connective tissue with a large amount of matrix material (C)</p> Signup and view all the answers

Which statement best reflects the role of lymph as a specialized connective tissue?

<p>It maintains fluid levels and participates in immune responses. (D)</p> Signup and view all the answers

What components are primarily found in vascular tissue?

<p>Red blood cells, white blood cells, platelets, and plasma (A)</p> Signup and view all the answers

What characteristic distinguishes connective tissues like blood and lymph from other types of tissues?

<p>They connect different systems of the body. (A)</p> Signup and view all the answers

Which matrix component is most prominent in bone tissue?

<p>Collagen fibers (C)</p> Signup and view all the answers

What is the role of dendrites in the neuron?

<p>To receive nerve impulses from other neurons (C)</p> Signup and view all the answers

How does blood differ from other connective tissues?

<p>It transports oxygen and nutrients throughout the body. (A)</p> Signup and view all the answers

What is the primary function of companion cells in angiosperms?

<p>Support sieve-tube elements (B)</p> Signup and view all the answers

What role do intercalary meristems play in plants?

<p>Enable leaf blade elongation (A)</p> Signup and view all the answers

Which type of tissue forms coverings and linings of body surfaces?

<p>Epithelial Tissue (A)</p> Signup and view all the answers

What is the main function of leukocytes in the body?

<p>Defend against infections (A)</p> Signup and view all the answers

Which tissue type is primarily involved in providing support and connecting other tissues?

<p>Loose Connective Tissue (C)</p> Signup and view all the answers

What characterizes cuboidal epithelial tissue?

<p>Short cells of similar thickness (D)</p> Signup and view all the answers

What is the primary function of dense connective tissue?

<p>Have a higher density of fibers (C)</p> Signup and view all the answers

What is the main role of ligaments in the body?

<p>Support and hold bones together (C)</p> Signup and view all the answers

What type of tissues are primarily responsible for the transportation of organic compounds in plants?

<p>Phloem (C)</p> Signup and view all the answers

Which type of epithelial tissue is specialized for secreting products?

<p>Secretory Epithelial Tissue (B)</p> Signup and view all the answers

Which component of the plant tissue serves as the first line of defense?

<p>Periderm (A)</p> Signup and view all the answers

Identify the type of muscular tissue that lacks striations.

<p>Smooth Muscular Tissue (C)</p> Signup and view all the answers

What is the function of the subsidiary cells in relation to stomata?

<p>They regulate the opening and closing of the stomata. (C)</p> Signup and view all the answers

What is the primary structural characteristic of parenchyma cells?

<p>Storage cells (A)</p> Signup and view all the answers

Which of the following best describes pyrimidines?

<p>Six-membered rings containing carbon and nitrogen (B)</p> Signup and view all the answers

What role do tendons play in the muscular system?

<p>Connect muscles to bones (D)</p> Signup and view all the answers

Flashcards

Bone Composition

Connective tissue with a substantial matrix.

Skeletal Connective Tissue

Supports internal structures, articulates bones.

Blood Composition

Specialized Connective Tissue; transports vital elements.

Blood Function

Connects body systems; oxygen, nutrient, and waste transport.

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Connective Tissue Type

Blood is a connective tissue type.

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Lymph Definition

Connective tissue that maintains fluid balance and supports immunity.

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Lymph Function

Connective tissue maintaining fluid levels and transporting substances.

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Vascular Tissue

Fluid connective tissue comprising blood cells and plasma.

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Sieve-tube elements

The conducting cells in angiosperms' phloem, responsible for transporting sugars.

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Tracheary elements

The conducting cells in the xylem, responsible for transporting water and minerals.

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Vessel elements

One type of tracheary element characterized by vessel members.

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Tracheids

Another type of tracheary element, typically found in gymnosperms.

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Monosaccharides

Simple sugars with a formula of (CH2O)n, monomers of larger carbohydrates.

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Proteins: What are they made of?

Proteins are complex molecules made up of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.

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Amino Acids

Simple compounds that serve as the building blocks of proteins.

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Primary Structure

The sequence of amino acids in a polypeptide chain.

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Secondary Structure

The formation of ɑ-helices and β-pleated sheets in a polypeptide chain, stabilized by hydrogen bonds.

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Tertiary Structure

The overall three-dimensional shape of a protein, stabilized by various bonds and interactions.

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What are guard cells?

Specialized cells in the stomata that surround a pore, controlling its opening and closing.

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What are companion cells?

Cells that support and help sieve-tube elements in angiosperms, supplying them with energy and nutrients.

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Ground tissue

The primary tissue in plants, responsible for functions like photosynthesis, storage, and support.

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Intercalary meristems

Meristematic regions found at the base of monocot leaf blades, allowing for leaf growth in length.

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Lateral meristems

Meristematic tissues responsible for growth in thickness (girth) in plants.

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Dendrites

Branching extensions of a neuron that receive nerve impulses from other neurons.

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Epithelial tissue

Tissue that covers or lines all free body surfaces, both internal and external.

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Enzymes

Proteins that act as catalysts, speeding up chemical reactions in living organisms.

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DNA vs. RNA

DNA is a double-stranded molecule with deoxyribose sugar and thymine, while RNA is single-stranded with ribose sugar and uracil.

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Nucleotides

The building blocks of nucleic acids, composed of a nitrogenous base, a pentose sugar, and a phosphate group.

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mRNA

A type of RNA that carries genetic information from the nucleus to ribosomes for protein synthesis.

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tRNA

An adaptor molecule that brings the correct amino acid to the ribosome during protein synthesis.

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rRNA

A type of RNA that forms the ribosome, the cell's protein factory.

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Codon

A sequence of three nucleotides in DNA or RNA that codes for a specific amino acid or stop signal.

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Start Codon

The initial set of codons in an mRNA transcript that signals the start of protein synthesis.

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Nucleotides

The basic building blocks of both DNA and RNA, composed of a nitrogenous base, a pentose sugar, and a phosphate group.

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Parenchyma

Parenchyma cells are like the storage units of a plant, holding water, food, and other vital substances for the plant's needs.

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Periderm

Periderm is the outer protective layer of a plant, akin to its skin, shielding it from harm and infection.

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Sclerenchyma

Sclerenchyma cells are like the tough scaffolding of a plant, providing strength and support to its structure.

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Phloem

Phloem is the 'delivery system' of a plant, transporting food made during photosynthesis to all other parts.

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Stomata (or Stomates)

Stomata are tiny pores on the surface of a leaf that allow for the exchange of gases like carbon dioxide and oxygen.

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Villi (or Villus)

Villi are tiny finger-like projections that increase the surface area for better absorption in the small intestine.

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Sensory Epithelial Tissue

Sensory epithelial tissue is like the 'feelers' of an animal, specialized to detect stimuli like touch, taste, smell, and light.

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Skeletal Muscular Tissue

Skeletal muscle tissue is the type of tissue that makes up your muscles, allowing you to move and control your body.

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Study Notes

Plant and Animal Tissues

  • Tissues are groups of cells with a similar function within an organism.
  • Levels of organization in animals include atom, molecule, protoplasm, cell, tissue, organ, organ system, and organism.
  • The arrangement of epithelial tissue can be simple, stratified, or pseudostratified.
  • Functionally, epithelial tissue can be protective, glandular (secretory), sensory, or involved in absorption or filtration.
  • Epithelial tissue forms the covering or lining of all free body surfaces (both external and internal).
  • Epithelial cells are compact and bonded together by intercellular cement for strength.
  • Epithelial cells are often supported by a basement membrane.
  • Types of epithelial cells include squamous, cuboidal, columnar, ciliated, or flagellated.

Animal Tissues

  • Epithelial tissue is the covering or lining of free surfaces.
  • Connective tissue holds organs, structures, and tissues in place, characterized by extracellular matrix.
  • Types of connective tissue include loose connective tissue (areolar and adipose), dense connective tissue (tendons and ligaments), skeletal connective tissue (bone and cartilage), and fluid connective tissue (blood and lymph).
  • Nervous tissue is made up of neurons and neuroglia which support neurons.
  • Muscular tissue is made of elongated cells or fibers that make possible body and part movement.
  • Types of muscular tissue: skeletal, cardiac, and smooth.

Plant Tissues

  • There are three types of meristematic tissues: apical (growth), lateral (thickness), and intercalary (length).
  • Permanent tissues are specialized for elasticity, flexibility, and strength.
  • Types of permanent tissue include simple (parenchyma, collenchyma, and sclerenchyma) and complex (dermal and vascular). Vascular tissue includes xylem and phloem.

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