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7.45 Mutations and Effects on Proteins and Traits Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.45 Mutations and Effects on Proteins and Traits. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Mutations and Effects on Proteins and Traits - Which statement best predicts the effect of the described gene mutation on protein function? (NGSS MS‑LS3‑1)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 7

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

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Below are sample questions representative of the exercises included on this worksheet and related 7.45 Mutations and Effects on Proteins and Traits skill assessments:

Problem 1Difficulty: Mastery

A student is told that 3 bases = 1 codon. A gene has a deletion of 30 bases that removes an entire short loop that helps the protein grab its target. The rest of the reading frame is unchanged.

Which statement best predicts the effect on protein function?

AThe deletion causes a frameshift, so all amino acids after the deletion change.

BThe mutation cannot affect function because the reading frame stayed the same.

CThe protein will be longer because DNA was deleted.

DThe protein will be missing 10 amino acids in a loop that helps binding, so it may bind its target less well and function may drop.

Solution & Explanation:To predict the effect, decide whether the mutation changes the amino-acid sequence (protein shape) or changes how much protein is made. Bigger changes to the sequence usually have bigger effects on function. That matches the correct statement.

Problem 2Difficulty: Mastery

A gene has a missense mutation that slightly lowers enzyme activity. Another gene in the same pathway can partially compensate by making a similar enzyme.,,Science

,,Science "Which statement best predicts the trait outcome?,A. The trait might change a little rather than completely because partial compensation can reduce the impact of the mutation. | B. The trait must be completely lost because any mutation stops the pathway. | C. The mutation cannot affect traits because only chromosomes matter. | D. The trait must be completely normal because compensation always fixes everything.,A,To predict the effect

Adecide whether the mutation changes the amino-acid sequence (protein shape) or changes how much protein is made. Bigger changes to the sequence usually have bigger effects on function. That matches the correct statement.,NO,,,,,online_practice_skill_page,practice,Mutations and Effects on Proteins and Traits practice questions for Grade 7 science,Grade 7 science mutations and effects on proteins and traits online practice

BSCI.7.45 practice questions

Cheredity and variation of traits review questions

Dmutations and effects on proteins and traits with explanations,Grade 7 Science Practice: Mutations and Effects on Proteins and Traits,Mutations and Effects on Proteins and Traits,Mutations and Effects on Proteins and Traits

EGrade 7 Science Practice,Practice mutations and effects on proteins and traits in Grade 7 science with online questions

Solution & Explanation:and clear explanations for focused review.,mutations-and-effects-on-proteins-and-traits-practice-questions,/grade-7/science/sci-7-45/mutations-and-effects-on-proteins-and-traits-practice-questions/,Grade 7 Science — Heredity and Variation of Traits Online Practice,Asexual and Sexual Reproduction and Variation | Environmental and Genetic Influences on Traits | Environmental and Genetic Factors in Growth | Animal Reproductive Behaviors and Success,sci-7-45,,/grade-7/science/sci-7-46/asexual-and-sexual-reproduction-and-variation-practice-questions/ | /grade-7/science/sci-7-49/environmental-and-genetic-influences-on-traits-practice-questions/ | /grade-7/science/sci-7-23/environmental-and-genetic-factors-in-growth-practice-questions/ | /grade-7/science/sci-7-22/animal-reproductive-behaviors-and-success-practice-questions/,/grade-7/,/grade-7/science/,/grade-7/science/heredity-and-variation-of-traits/,/grade-7/science/sci-7-45/,Home::/ > Grade 7::/grade-7/ > Science::/grade-7/science/ > Heredity and Variation of Traits::/grade-7/science/heredity-and-variation-of-traits/ > SCI.7.45::/grade-7/science/sci-7-45/ > Mutations and Effects on Proteins and Traits::/grade-7/science/sci-7-45/mutations-and-effects-on-proteins-and-traits-practice-questions/,BreadcrumbList|FAQPage,index

Problem 3Difficulty: Mastery

A mutation changes a codon from GAA to AAA, changing glutamate (negative) to lysine (positive) on the protein surface where it binds DNA.

Which statement best predicts the effect?

AThe mutation only affects mRNA amount.

BThe protein will become shorter because charges change length.

CThe mutation cannot affect binding because DNA-binding happens in RNA.

DBinding to DNA may change because the charge changed, which can change gene regulation and traits.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 7 Science students. It aligns with educational standard SCI.7.45 (Grade 7 science practice focused on mutations and effects on proteins and traits.).