RI NGSA Science Grade 11 Practice Questions - Rhode Island Next Generation Science Assessment (NGSA), Grade 11 Exam - RI NGSA Science Grade 11 Practice Questions - Rhode Island Next Generation Science Assessment (NGSA), Grade 11 Exam

Question 1

During DNA replication, which enzyme is primarily responsible for unwinding the double helix by breaking the hydrogen bonds between complementary nitrogenous bases?

DNA ligase DNA helicase RNA polymerase DNA topoisomerase

Correct Answer:

DNA helicase

Question 2

Why is the lagging strand synthesized discontinuously as Okazaki fragments during DNA replication?

DNA polymerase can only synthesize a new strand in the 5' to 3' direction. RNA primers can only attach to the 3' end of the parent template strand. DNA helicase unwinds DNA exclusively in one direction at a time. The lagging strand lacks complementary purine bases required for continuous synthesis.

Correct Answer:

DNA polymerase can only synthesize a new strand in the 5' to 3' direction.

Question 3

If a DNA template strand has the nucleotide sequence 3'-TAC GGC TTA CGA-5', what is the sequence of the mRNA transcript synthesized during transcription?

5'-AUG CCG AAU GGU-3' 5'-AUG CCG AAU GCU-3' 5'-UAC GGC UUA CGA-3' 5'-ATG CCG AAT GCT-3'

Correct Answer:

5'-AUG CCG AAU GCU-3'

Question 4

Which post-transcriptional process in eukaryotic cells removes non-coding regions from pre-mRNA before nuclear export?

Addition of a 7-methylguanosine 5' cap Polyadenylation at the 3' end Splicing of introns by spliceosomes Promoter methylation by DNA methyltransferase

Correct Answer:

Splicing of introns by spliceosomes

Question 5

A tRNA molecule carries the anticodon 3'-UAC-5'. Which mRNA codon does it bind to, and which amino acid does it deliver?

Codon 5'-AUG-3', delivering Methionine Codon 5'-UAC-3', delivering Tyrosine Codon 5'-AUU-3', delivering Isoleucine Codon 5'-GUG-3', delivering Valine

Correct Answer:

Codon 5'-AUG-3', delivering Methionine

Question 1

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Prepare with the RI NGSA Science Grade 11 Practice Questions - Rhode Island Next Generation Science Assessment (NGSA), Grade 11 Exam practice quiz. This question bank includes 100 questions covering reaction, chemical, amino, blood, and temperature. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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RI NGSA Science Grade 11 Practice Questions - Rhode Island Next Generation Science Assessment (NGSA), Grade 11 Exam

This practice set contains 100 questions from the matching question bank and focuses on reaction, chemical, amino, blood, and temperature. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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RI NGSA Science Grade 11 Practice Questions - Rhode Island Next Generation Science Assessment (NGSA), Grade 11 Exam

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