L3 Molecular Composition of Cells

Mer Scott
Quiz by Mer Scott, updated more than 1 year ago
Mer Scott
Created by Mer Scott almost 4 years ago
13
3

Description

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.

Resource summary

Question 1

Question
Amino acids, simple carbohydrates, and lipids are examples of:
Answer
  • "Building blocks"
  • Macromolecules
  • Organelles

Question 2

Question
Proteins, DNA (nucleic acid), and complex carbohydrates are examples of:
Answer
  • Macromolecules
  • Organelles
  • Monosaccharides

Question 3

Question
Macromolecules form supramolecular assemblies. Which of these examples are NOT a supramolecular assembly?
Answer
  • Membranes
  • Ribosomes
  • Chromatin
  • Mitochondria

Question 4

Question
Which of these "building blocks" cannot be polymerised?
Answer
  • Amino acids
  • Simple carbohydrates
  • Neucleobases
  • Lipids

Question 5

Question
Which statement about macromolecules is INCORRECT?
Answer
  • 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.

Question 6

Question
Hexose monosaccharides make up [blank_start]higher order carbohydrates[blank_end]. Pentose monosaccharides make up [blank_start]nucleic acids[blank_end] e.g. deoxyribose, ribose.
Answer
  • higher order carbohydrates
  • nucleic acids

Question 7

Question
Which of these statements/"equations" is false?
Answer
  • Glucose + Fructose = Sucrose
  • Galactose + Glucose = Lactose
  • Glucose + Glucose = Maltose
  • Fructose + Galactose = Trehalose

Question 8

Question
Which of these statements about carbohydrates are true?
Answer
  • 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.

Question 9

Question
Glucose can be in a [blank_start]linear[blank_end] form, which is more reactive, or in a [blank_start]ring[blank_end] form, which is more stable.
Answer
  • linear
  • ring
  • ring
  • linear

Question 10

Question
Which of the following is NOT a function or carbohydrates?
Answer
  • Cell recognition
  • Storage of energy
  • Structure
  • Synthesis of proteins

Question 11

Question
Lipids (fats, steroids, phospholipids, fat soluble vitamins) are hydrophilic.
Answer
  • True
  • False

Question 12

Question
Which of the following statements about functions of lipids are CORRECT?
Answer
  • Lipids provide structure.
  • Lipids like testosterone perform regulatory functions.
  • Lipids store energy.
  • Lipids help resist tension.

Question 13

Question
Which statement BEST describes the differences between DNA and RNA?
Answer
  • 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.

Question 14

Question
Which of these statements about proteins is INCORRECT?
Answer
  • 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.

Question 15

Question
Which of these are functions of proteins?
Answer
  • 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
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