Question 1

What happens when phospholipids are placed in an aqueous solution?

Accepted Answer

A)  They disperse and form polar bonds with other organic molecules present in the solution. 
B)  They move to the water's surface and form a single-layered membrane between the water and the atmosphere. 
C)  They repel one another. 
D)  They spontaneously form bilayers. 
E)  The hydrophobic tales force the phospholipids to form "beads" at the surface, much like what you see when vegetable oil is added to water 
A)  They disperse and form polar bonds with other organic molecules present in the solution. 
B)  They move to the water's surface and form a single-layered membrane between the water and the atmosphere. 
C)  They repel one another. 
D)  They spontaneously form bilayers. 
E)  The hydrophobic tales force the phospholipids to form "beads" at the surface, much like what you see when vegetable oil is added to water

Question 2

The most basic essence of life is ____.

Accepted Answer

A)  reproduction of a keystone species 
B)  reproduction of genetic information 
C)  reproduction of cells 
D)  photosynthesis 
E)  redox reactions 
A)  reproduction of a keystone species 
B)  reproduction of genetic information 
C)  reproduction of cells 
D)  photosynthesis 
E)  redox reactions

Question 3

Life today derives nearly all its energy from ____.

Accepted Answer

A)  glucose molecules 
B)  the sun 
C)  hydrothermal vents 
D)  geochemical activity 
E)  radioactive decay 
A)  glucose molecules 
B)  the sun 
C)  hydrothermal vents 
D)  geochemical activity 
E)  radioactive decay

Question 4

The nonequilibrium created by ____ represents a renewing source of energy.

Accepted Answer

A)  temperature gradients 
B)  acidic ocean vents 
C)  alkaline ocean vents 
D)  radioactive decay 
E)  protocell formation 
A)  temperature gradients 
B)  acidic ocean vents 
C)  alkaline ocean vents 
D)  radioactive decay 
E)  protocell formation

Question 5

Match between columns
                        Premises: inevitable outcome of physical and chemical conditions of Earth's origins
required process that must have occurred before the first cells existed
source of free energy at alkaline ocean vents
possible origin site for life on Earth; abundance of chemicals essential for life and a reducing environment
theory about possible origins of life that cannot be tested
the precursors of mitochondria and chloroplasts
the basic chemical structure that serves as the containment of cells and cell-like objects
the first water-splitting photosynthesizers
rock structures where the earliest evidence of life is found
remains of a cell that has decayed and been filled in by silica or calcium carbonate
enable cells to control ionic gradients
molecules capable of storing and copying genetic material
replication process shared by plastids and bacteria
the likely first information molecules
these share a common ancestor with the first eukaryotic cells

Accepted Answer

The Answer of natural selection and evolution of life and is...

Question 6

One piece of evidence in support of the endosymbiotic theory is that ____.

Accepted Answer

A)    mitochondria, plastids, and bacteria have cell walls of the same composition 
B)  mitochondria and plastids are similar in size to bacteria 
C)  mitochondria and plastids are similar in structure to archaea 
D)  plastids can live free of a eukaryotic cell 
E)  mitochondria and cyanobacteria process energy similarly 
A)    mitochondria, plastids, and bacteria have cell walls of the same composition 
B)  mitochondria and plastids are similar in size to bacteria 
C)  mitochondria and plastids are similar in structure to archaea 
D)  plastids can live free of a eukaryotic cell 
E)  mitochondria and cyanobacteria process energy similarly

Exam 25: The Origin of Life

What happens when phospholipids are placed in an aqueous solution?

The most basic essence of life is ____.

Life today derives nearly all its energy from ____.

The nonequilibrium created by ____ represents a renewing source of energy.

One piece of evidence in support of the endosymbiotic theory is that ____.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

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