In DNA replication, which occurs first?

DNA polymerase adds new nucleotides

DNA polymerase replaces RNA with DNA

DNA ligase binds segments together

What is the orientation of DNA strands?

Double strand, semiconservative

What is the correct order of function in replication?

helicase, ssbp, topoisomerase, RNA primer

helicase, ssbp, topoisomerase, DNA primer

helicase, topoisomerase, ssbp, RNA primer

ssbp, helicase, topoisomerase, DNA primer

A ribosome has three binding sites for tRNA. Match the site with the correct function.

A site holds tRNA that carries next amino acid added to chain

P site holds tRNA that carries next amino acid added to chain

A site is where discharged tRNAs leave the ribosome

E site holds tRNA that carries the growing amino acid chain

Base substitutions of the 3rd base of codon rarely result in an error in polypeptide because...

base pair rule less strict for the 3rd base codon/anticodons

substitutions are corrected before transcription begins

substitutions are restricted to introns

transcribed errors attract snRNP’s,stimulating splicing

The anticodon of a particular tRNA molecule is...

complementary to the corresponding mRNA codon

complementary to the rRNA triplet

part of tRNA that bonds to a specific amino acid

changeable, depends on the amino acid that bonds to the tRNA

Which of the following mutations would be most likely to have a harmful effect on an organism?

single nucleotide inserted close to start of coding sequence

a deletion of three nucleotides near the middle of a gene

a nucleotide deletion at the end of the gene

Identify which of the following best describes purines and pyrimidines

Purines (A & G) have double ring, Pyrimidines (C, T, & U) have single ring

Purines (C, T, & U) have single ring, Pyrimidines (A & G) have double ring

Purines (A & G) have single ring, Pyrimidines (C, T, & U) have double ring

Purines (C, T, & U) have double ring, Pyrimidines (A & G) have single ring

Describe the difference between the synthesis of the leading and lagging strands.

synthesis continuity: leading = continuous & lagging = discontinuous

directionality: leading = 3' -> 5', lagging = 5' -> 3'

directionality: leading = 5' -> 3', lagging = 3' -> 5'

synthesis continuity: leading = discontinuous & lagging = continuous

How do the three types of RNA work together?

mRNA carries message, tRNA carries amino acids, and rRNA makes ribosome

mRNA carries amino acids, tRNA transfer message, and rRNA makes ribosome

mRNA makes ribosomes, tRNA carries amino acids, and rRNA relays information

mRNA is made, tRNA holds the DNA in place, and rRNA removes the deoxyribose

Which of the following describes epigenetic changes that affect gene expression?

DNA methylation or histone acetylation

post-transcriptional modification

Which of the following genetic engineering techniques is incorrectly described?

PCR allows for DNA fragments to be stabilized for engineering processes

Electrophoresis separates molecules based on size & charge

Bacterial transformation introduces DNA to bacterial cells

DNA sequencing determines the order of nucleotides in a DNA molecule

From microarray data, what can we conclude?

which genes may be affected in cancer

What does transgenic mean?

An organism that has had another species' DNA put in it

An organism that can change its genes at will

A stem cell that can differentiate into anything

A bacteria that reproduces asexually

a unit made up of linked genes that code for proteins needed to do a specific task

What is the role of operons in prokaryote gene expression?

It accounts for the regulation of gene activity in response to the needs of the cells

It makes the genes prokaryotes be turned on

To make the gene turn of and off

AP Biology Unit 6 Exam

Authored by Charles Martinez

Biology

9th - 12th Grade

NGSS covered

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44 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Group of structural and regulating genes that functions as a single unit

Operon

Plasmid

DNA

Oncogene

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an operon, a sequence of DNA where RNA polymerase begins transcription

Repressor

Inducer

Structurel Gene

Promoter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an analysis of the nucleotide composition of DNA, which of the following will be found

A=C

A+G = C + T

G + C = A + T

A = G and C = T

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An amino acid deficiency in an organism is most likely to affect

post translation

translation

post transcription

transcription

Amino acid tryptophan is added to the agar the E.coli are growing on, the trp operon will be

not affected

increased in function

repressed

induced

DNA wrapped around histone proteins

nucleosome

Barr body

helicase

primase

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The pink ribbon-like structure is

tRNA

DNA

mRNA

rRNA

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AP Biology Unit 6 Exam

Group of structural and regulating genes that functions as a single unit

In an operon, a sequence of DNA where RNA polymerase begins transcription

In an analysis of the nucleotide composition of DNA, which of the following will be found

An amino acid deficiency in an organism is most likely to affect

Amino acid tryptophan is added to the agar the E.coli are growing on, the trp operon will be

DNA wrapped around histone proteins

The pink ribbon-like structure is

Small, circular DNA molecules from bacteria are called...

In the diagram, what is structure #1?

In the diagram what is #4?

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