Mer Scott
Test por , creado hace más de 1 año

Objectives: List the major atomic constituents of biological macromolecules. • Describe the relationship between molecular “building blocks” and higher order of structures in cells. • Identify the structures of the major types of biomolecules in cells. • Describe, with examples, the roles of carbohydrates, lipids, proteins and nucleic acids in cells.

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Mer Scott
Creado por Mer Scott hace más de 7 años
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L3 Molecular Composition of Cells

Pregunta 1 de 15

1

Amino acids, simple carbohydrates, and lipids are examples of:

Selecciona una de las siguientes respuestas posibles:

  • "Building blocks"

  • Macromolecules

  • Organelles

Explicación

Pregunta 2 de 15

1

Proteins, DNA (nucleic acid), and complex carbohydrates are examples of:

Selecciona una de las siguientes respuestas posibles:

  • Macromolecules

  • Organelles

  • Monosaccharides

Explicación

Pregunta 3 de 15

1

Macromolecules form supramolecular assemblies. Which of these examples are NOT a supramolecular assembly?

Selecciona una o más de las siguientes respuestas posibles:

  • Membranes

  • Ribosomes

  • Chromatin

  • Mitochondria

Explicación

Pregunta 4 de 15

1

Which of these "building blocks" cannot be polymerised?

Selecciona una o más de las siguientes respuestas posibles:

  • Amino acids

  • Simple carbohydrates

  • Neucleobases

  • Lipids

Explicación

Pregunta 5 de 15

1

Which statement about macromolecules is INCORRECT?

Selecciona una o más de las siguientes respuestas posibles:

  • Monosaccharides and disaccharides are simple carbohydrates.

  • Monosaccharides and disaccharides are what we call sugars.

  • A disaccharide is made up of two monosaccharides.

  • A polysaccharide is made up more than 10 monosaccharides.

  • A polysaccharide is a simple carbohydrate.

Explicación

Pregunta 6 de 15

1

Hexose monosaccharides make up . Pentose monosaccharides make up e.g. deoxyribose, ribose.

Arrastra y suelta para completar el texto.

    higher order carbohydrates
    nucleic acids

Explicación

Pregunta 7 de 15

1

Which of these statements/"equations" is false?

Selecciona una o más de las siguientes respuestas posibles:

  • Glucose + Fructose = Sucrose

  • Galactose + Glucose = Lactose

  • Glucose + Glucose = Maltose

  • Fructose + Galactose = Trehalose

Explicación

Pregunta 8 de 15

1

Which of these statements about carbohydrates are true?

Selecciona una o más de las siguientes respuestas posibles:

  • Starch and cellulose are polysaccharides found in plants.

  • Glycogen is the complex carbohydrate found in animals.

  • Cellulose is formed from β-glucose monomers.

  • β-glucose has all its -OH groups on the same side.

  • α-glucose is an isomer of the glucose molecule with the -OH groups on different sides.

  • Starch and glycogen are made up of α-glucose monomers.

Explicación

Pregunta 9 de 15

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

Glucose can be in a ( linear, ring ) form, which is more reactive, or in a ( ring, linear ) form, which is more stable.

Explicación

Pregunta 10 de 15

1

Which of the following is NOT a function or carbohydrates?

Selecciona una o más de las siguientes respuestas posibles:

  • Cell recognition

  • Storage of energy

  • Structure

  • Synthesis of proteins

Explicación

Pregunta 11 de 15

1

Lipids (fats, steroids, phospholipids, fat soluble vitamins) are hydrophilic.

Selecciona uno de los siguientes:

  • VERDADERO
  • FALSO

Explicación

Pregunta 12 de 15

1

Which of the following statements about functions of lipids are CORRECT?

Selecciona una o más de las siguientes respuestas posibles:

  • Lipids provide structure.

  • Lipids like testosterone perform regulatory functions.

  • Lipids store energy.

  • Lipids help resist tension.

Explicación

Pregunta 13 de 15

1

Which statement BEST describes the differences between DNA and RNA?

Selecciona una de las siguientes respuestas posibles:

  • DNA is a double helix while RNA is a single strand.

  • DNA is made up of four bases, and RNA shares three of these, while having one unique base (uracil in place of thymine).

  • DNA is a double helix with hydrogen groups, and contains the bases thymine, adenine, guanine, and cytosine. RNA is a single strand with -OH groups, and uses uracil in place of thymine.

Explicación

Pregunta 14 de 15

1

Which of these statements about proteins is INCORRECT?

Selecciona una de las siguientes respuestas posibles:

  • Proteins are polymers of amino acids.

  • There are about 100,000 unique proteins

  • One gene can code for several proteins

  • Proteins are mainly for structural support.

Explicación

Pregunta 15 de 15

1

Which of these are functions of proteins?

Selecciona una o más de las siguientes respuestas posibles:

  • Proteins provide structure e.g collagen to resist tension.

  • Proteins are regulatory and maintain homeostasis e.g. insulin in the plasma membrane.

  • Proteins are contractile e.g. actin and myosin in muscle fibers.

  • Proteins can transport things e.g. haemoglobin moving oxygen via the cardiovascular system.

  • Proteins can store materials e.g egg white - albumin

  • Some proteins are highly acidic and act to break down cells in their regulated death cycle.

  • Some proteins are immune proteins which protect the system e.g. antibodies like IgG

Explicación

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