Question 1

The following questions refer to this table of codons.
  
-What would the anticodon be for a tRNA that transports phenylalanine to a ribosome?

Accepted Answer

A) UUU 
B) AAA 
C) TTT 
D) CCC 
E) GGG 
A) UUU 
B) AAA 
C) TTT 
D) CCC 
E) GGG

Question 2

The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon.This results in

Accepted Answer

A) a base-pair substitution. 
B) a nucleotide mismatch. 
C) a frameshift mutation. 
D) a polypeptide missing an amino acid. 
E) a nonsense mutation. 
A) a base-pair substitution. 
B) a nucleotide mismatch. 
C) a frameshift mutation. 
D) a polypeptide missing an amino acid. 
E) a nonsense mutation.

Question 3

There are 61 mRNA codons that specify an amino acid,but only 45 tRNAs.This is best explained by the fact that

Accepted Answer

A) some tRNAs have anticodons that recognize four or more different codons. 
B) the rules for base pairing between the third base of a codon and tRNA are flexible. 
C) many codons are never used, so the tRNAs that recognize them are dispensable. 
D) the DNA codes for all 61 tRNAs but some are then destroyed. 
E) competitive exclusion forces some tRNAs to be destroyed by nucleases. 
A) some tRNAs have anticodons that recognize four or more different codons. 
B) the rules for base pairing between the third base of a codon and tRNA are flexible. 
C) many codons are never used, so the tRNAs that recognize them are dispensable. 
D) the DNA codes for all 61 tRNAs but some are then destroyed. 
E) competitive exclusion forces some tRNAs to be destroyed by nucleases.

Question 4

Use this representation to answer the following questions.
DNA template strand 5' ____________________________ 3'
DNA complementary strand 3' ____________________________ 5'
-Given the locally unwound double strand above,in which direction does the RNA polymerase move?

Accepted Answer

A) 3' → 5' along the template strand 
B) 5' → 3' along the template strand 
C) 3' → 5' along the complementary strand 
D) 5' → 3' along the complementary strand 
E) 5' → 3' along the double-stranded DNA 
A) 3' → 5' along the template strand 
B) 5' → 3' along the template strand 
C) 3' → 5' along the complementary strand 
D) 5' → 3' along the complementary strand 
E) 5' → 3' along the double-stranded DNA

Question 5

A part of the promoter,called the TATA box,is said to be highly conserved in evolution.Which of the following might this illustrate?

Accepted Answer

A) The sequence evolves very rapidly. 
B) The sequence does not mutate. 
C) Any mutation in the sequence is selected against. 
D) The sequence is found in many but not all promoters. 
E) The sequence is transcribed at the start of every gene. 
A) The sequence evolves very rapidly. 
B) The sequence does not mutate. 
C) Any mutation in the sequence is selected against. 
D) The sequence is found in many but not all promoters. 
E) The sequence is transcribed at the start of every gene.

Question 6

What does translation require?

Accepted Answer

A) mRNA, tRNA, DNA, and rRNA 
B) mRNA, DNA, and rRNA 
C) mRNA, tRNA, and rRNA 
D) mRNA, tRNA, and DNA 
E) tRNA and rRNA 
A) mRNA, tRNA, DNA, and rRNA 
B) mRNA, DNA, and rRNA 
C) mRNA, tRNA, and rRNA 
D) mRNA, tRNA, and DNA 
E) tRNA and rRNA

Exam 17: From Gene to Protein

The following questions refer to this table of codons. -What would the anticodon be for a tRNA that transports phenylalanine to a ribosome?

The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon.This results in

There are 61 mRNA codons that specify an amino acid,but only 45 tRNAs.This is best explained by the fact that

Use this representation to answer the following questions. DNA template strand 5' ____________________________ 3' DNA complementary strand 3' ____________________________ 5' -Given the locally unwound double strand above,in which direction does the RNA polymerase move?

A part of the promoter,called the TATA box,is said to be highly conserved in evolution.Which of the following might this illustrate?

What does translation require?

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure,Growth,and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons,Synapses,and Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

Filters

Use this representation to answer the following questions. DNA template strand 5' 3' DNA complementary strand 3' 5' -Given the locally unwound double strand above,in which direction does the RNA polymerase move?