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02 Molecular Biology for Biotechnology Online Quiz Questions

Use this free practice quiz with 20 questions to review 02 Molecular Biology for Biotechnology, test your knowledge, and prepare for your next test or exam.

20 questions
01
Fill in the blank
1 point

Bacteria may carry smaller DNA molecules in addition to their main chromosome. These molecules are called .

02
Written response
1 point

Which enzyme uses a DNA strand as a template to synthesize RNA during transcription?

03
True or false
1 point

Every gene's functional product must be a protein.

  1. A

    True

  2. B

    False

04
Fill in the blank
1 point

A DNA element that helps control where transcription begins is called a .

05
Written response
1 point

What is the name for a three-base unit of mRNA that a ribosome reads during translation?

06
Choose one
1 point

Which description best defines an organism’s genome?

  1. A

    The complete set of proteins an organism produces

  2. B

    The complete set of an organism’s DNA, including genes and noncoding sequences

  3. C

    Only the DNA regions that encode proteins

  4. D

    The set of RNA molecules present in a single cell

07
Choose all
1 point

Which components can be part of an organism’s genome? Select all correct answers.

  1. A

    Genes

  2. B

    Regulatory DNA sequences

  3. C

    Other noncoding DNA sequences

  4. D

    Only DNA sequences that encode proteins

  5. E

    The proteins encoded by the DNA

08
True or false
1 point

An organism with a larger genome is necessarily more complex than an organism with a smaller genome. True or false?

  1. A

    True

  2. B

    False

09
Choose one
1 point

A researcher wants to make many copies of one selected DNA region. Which method best fits this goal?

  1. A

    Read the nucleotide order of an entire genome

  2. B

    Amplify a selected DNA region

  3. C

    Measure the amount of a protein directly

  4. D

    Join exons in different combinations

10
Choose one
1 point

Considering base pairing, what RNA sequence is complementary to the DNA template sequence A-C-G-T, in the same listed order?

  1. A

    A-C-G-T

  2. B

    T-G-C-A

  3. C

    U-G-C-A

  4. D

    U-C-G-A

11
Choose all
1 point

A chosen gene has been introduced into a host cell to produce a protein. Which factors can affect whether the desired final product is made successfully? Select all correct answers.

  1. A

    Whether appropriate regulatory signals are present

  2. B

    Which host organism is used

  3. C

    How RNA is processed

  4. D

    Whether the protein folds properly

  5. E

    The size of the organism’s genome by itself

12
Choose one
1 point

A DNA sequence variant is found in a gene. Which conclusion is best supported?

  1. A

    Every change in DNA sequence disrupts the gene product

  2. B

    A sequence change may have different effects depending on its location and biological context

  3. C

    A sequence change can affect only noncoding DNA

  4. D

    A sequence change always alters a protein

13
Choose one
1 point

How can alternative splicing allow one eukaryotic gene to yield different RNA products?

  1. A

    It causes all introns to be translated into protein

  2. B

    It allows exons to be joined in different combinations, yielding different RNA products

  3. C

    It changes the DNA sequence of each chromosome

  4. D

    It prevents genes from producing functional RNA

14
Open ended
1 point

A researcher sequences a gene and also measures RNA and protein in cells. Explain what each type of measurement can reveal about the gene and its activity.

15
Choose one
1 point

A researcher wants to describe an organism’s entire DNA content, including sequences that do not encode proteins. Which term best describes what they are studying?

  1. A

    A list of only the protein-coding genes in an organism

  2. B

    The complete set of an organism’s DNA, including noncoding sequences

  3. C

    The set of proteins currently made by an organism

  4. D

    The DNA sequence of a single chromosome only

16
Choose one
1 point

A DNA strand has an adenine at a particular position. Which base pairs with it on the complementary strand?

  1. A

    Thymine

  2. B

    Cytosine

  3. C

    Guanine

  4. D

    Adenine

17
Choose one
1 point

During translation, how many bases does a ribosome read at a time in each codon?

  1. A

    One

  2. B

    Two

  3. C

    Three

  4. D

    Four

18
Written response
1 point

How many bases make up one mRNA codon? Enter the number of bases.

19
True or false
1 point

Bacterial gene expression typically includes the same nuclear RNA-processing stage as eukaryotic gene expression. True or false?

  1. A

    True

  2. B

    False

20
Written response
1 point

What term is used for different versions of a DNA sequence? Enter the plural term.