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Table of contents

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1. Introduction to Biology(0)
2. Chemistry(0)
3. Water(0)
4. Biomolecules(0)
5. Cell Components(0)
6. The Membrane(0)
7. Energy and Metabolism(0)
8. Respiration(0)
9. Photosynthesis(0)
10. Cell Signaling(0)
11. Cell Division(0)
12. Meiosis(0)
13. Mendelian Genetics(0)
14. DNA Synthesis(0)
15. Gene Expression(0)
16. Regulation of Expression(0)
17. Viruses(0)
- Viruses
  (0)
18. Biotechnology(0)
19. Genomics(0)
- Genomes
  (0)
20. Development(0)
21. Evolution by Natural Selection(0)
- Descent with Modification
  (0)
22. Evolution of Populations(0)
- Hardy-Weinberg Model
  (0)
- Genetic Variation
  (0)
23. Speciation(0)
- Species
  (0)
24. History of Life on Earth(0)
- History of Life on Earth
  (0)
25. Phylogeny(0)
- Phylogeny
  (0)
26. Prokaryotes(0)
27. Protists(0)
28. Plants(0)
29. Fungi(0)
- Fungi
  (0)
- Fungi Reproduction
  (0)
30. Overview of Animals(0)
- Overview of Animals
  (0)
31. Invertebrates(0)
32. Vertebrates(0)
33. Plant Anatomy(0)
34. Vascular Plant Transport(0)
- Water Potential
  (0)
35. Soil(0)
- Soil and Nutrients
  (0)
- Nitrogen Fixation
  (0)
36. Plant Reproduction(0)
- Flowers
  (0)
- Seeds
  (0)
37. Plant Sensation and Response(0)
38. Animal Form and Function(0)
39. Digestive System(0)
- Digestion
  (0)
- Blood Sugar Homeostasis
  (0)
40. Circulatory System(0)
41. Immune System(0)
42. Osmoregulation and Excretion(0)
- Osmoregulation and Excretion
  (0)
43. Endocrine System(0)
- Endocrine System
  (0)
44. Animal Reproduction(0)
- Animal Reproduction
  (0)
45. Nervous System(0)
- Neurons and Action Potentials
  (0)
- Central and Peripheral Nervous System
  (0)
46. Sensory Systems(0)
- Sensory System
  (0)
47. Muscle Systems(0)
- Musculoskeletal System
  (0)
48. Ecology(0)
- Ecology
  (0)
49. Animal Behavior(0)
- Animal Behavior
  (0)
50. Population Ecology(0)
- Population Ecology
  (0)
51. Community Ecology(0)
- Community Interactions
  (0)
- Community Structure
  (0)
52. Ecosystems(0)
- Ecosystems
  (0)
53. Conservation Biology(0)
- Conservation Biology
  (0)

15. Gene Expression

Mutations Practice Problems

15. Gene Expression

Mutations Practice Problems

13 problems

Previous Topic: Review of Transcription vs. Translation

1PRACTICE PROBLEM

The Cri-du-chat (cat's cry) syndrome is a condition in which a piece or region of chromosome 5 is deleted, resulting in the absence of all genes in that area. Infants with this condition have a cry that sounds like a cat. This is an example of:

2PRACTICE PROBLEM

Given the DNA strand 5' CCTGGCAAT 3', which of the following is considered a substitution mutation?

3PRACTICE PROBLEM

If a normal nucleotide sequence of 5' GGTTCC 3' mutates to 5' GGCTCC 3', this is considered as:

4PRACTICE PROBLEM

Deletion or addition of a single nucleotide is often more serious than losing or adding three nucleotides because it can lead to __________ mutation.

5PRACTICE PROBLEM

A null allele is a non-functional allele caused by a genetic mutation. If the transcriptomes of the wild-type and mutant are identical, where did the mutation most likely have an impact?

6PRACTICE PROBLEM

Prior to the industrial revolution, grey-coloured moths predominated; however, after the industrial revolution, black-coloured moths predominated because soot blackened the trunks of trees. Which of the following factors do you believe is responsible for the generation of a black allele in a population of grey-coloured moths?

7PRACTICE PROBLEM

A green parakeet gave birth to five young birds, four of which were green and one of which was yellow. The researcher determined the amino acid sequence for both enzymes responsible for green and yellow pigment production and found the following result:
GREEN: Ala-Gly-Val-Ala-Pro-Thr-Gly-Leu
YELLOW: Ala-Gly-Val-Ala-Thr-Thr-Gly-Leu
Identify which DNA base pair change resulted in the yellow-coloured parakeet.

8PRACTICE PROBLEM

Which of the following might be altered if the mRNA is present but the protein for an enzyme is absent in an organism?

9PRACTICE PROBLEM

Sickle cell anemia is an inherited disorder. It affects the shape of red blood cells, which carry oxygen to all parts of the body. Due to the sickle shape, it becomes more rigid, slowing and blocking the blood flow. The disorder is caused by a single nucleotide difference in the hemoglobin gene, which changes glutamic acid into valine. This type of mutation is an example of _______________.

10PRACTICE PROBLEM

_________ mutations are point mutations that will not alter the resulting amino acid, and _________ mutations are point mutations that can alter the resulting amino acid.

11PRACTICE PROBLEM

Which of the following mutations is considered the most deleterious?

12PRACTICE PROBLEM

Which of the following characterizes a point mutation?

13PRACTICE PROBLEM

Why is the deletion of three nucleotides considered to be less dangerous than the deletion of a single nucleotide?

Previous Topic: Review of Transcription vs. Translation

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