Free Printable Unit 7 Test- Gene Expression & Biotech. Test Review

Worksheets

Unit 7 Test- Gene Expression & Biotech. Test Review

Total questions: 24

Worksheet time: 12mins

Name

Class

Date

Through scientific research, genetic technologies have advanced the study of gene sequences. Which is a main benefit of gene therapy technology?

the ability to cure genetic diseases by replacing defective genes

the ability to genetically design organisms that have never existed

understanding how human genes turn on and off to make carbohydrates

making genetically superior plants and animals to benefit the entire world

The term cloning in science can refer to several types of scientific technology, including therapeutic, reproductive, and recombinant DNA. Which result of reproductive cloning poses the greatest ethical issue?

offspring that may transmit diseases

cells without inherited genetic defects

cells that may be used to heal damaged tisseus

offspring with a heightened risk of developing health problems

What is shown in Figure 9.3?

Gene Sequencing

Karyotype

DNA Fingerprint

Pedigree

The diagram depicts the process of DNA replication. What is the significance of this process?

provides the cell's genetic code to daughter cells

ensures that proteins are synthesized for cell division

provides the cell a chance to adapt to environmental changes

ensures that environmental conditions are conducive to cell division

In humans, where does DNA replication take place?

cytoplasm

ribosome

nucleus

vacuole

Which of the following events occurs directly after a DNA molecule is unzipped?

mismatched nucleotide bases are identified and replaced

free-floating nucleotides pair up with exposed bases

identical double-stranded DNA molecules are formed

Enzymes break hydrogen bonds between base pairs

Cystic fibrosis is an example of a genetic disease caused by the deletion of a nucleotide. What is the term for this type of mutation?

translocation

chromosomal

gene mutation

point mutation

Crossing over occurs during meiosis. Sometimes the segments do not cross over properly. They may break off different sized segments and the resulting chromosome may be missing a gene or may have duplicated genes. They may also not exchange segments with the correct chromosome and will exchange with a nonhomologous chromosome (translocation). What type of mutations are these examples of?

carcinogen

chromosomal mutation

point mutation

frameshift mutation

Errors sometimes happen during DNA replication. If a DNA nucleotide that contains guanine is accidentally substituted for a DNA nucleotide that contains thymine, which of the following will always happen because of the error in replication?

The cell will produce mRNA with a mutated nucleotide sequence

The cell will become a rapidly dividing cancer cell

The cell will die when it divides

The cell will have a better chance of surviving under different conditions

10.

The main function of tRNA is to

carry a message that, when translated forms proteins

form a portion of ribosomes, a cell's protein factories

string together complementary RNA and DNA strands

bring amino acids from the cytoplasm to the ribosomes

11.

What is the term for a three-nucleotide sequence that codes for an amino acid?

base

codon

nucleotide

serine

12.

A tRNA that carries the amino acid methionine pairs with which type of codon?

serine codon

tRNA codon

start codon

anticodon

13.

The process by which the order of bases in messenger RNA (mRNA) codes for the order of amino acids in a protein is called

translation

transcription

replication

nondisjunction

14.

Which of the following is the site of translation?

vacuole

lysosome

nucleus

ribosome

15.

DNA transcribes the information for protein synthesis in mRNA. Where does transcription take place?

in the nucleus

bound to amino acids on tRNA

attached to the ribosomes

in the cytoplasm

16.

During transcription, what does messenger RNA do?

delivers DNA's instructions for making proteins

constructs proteins out of random amino acids

strings together two complementary DNA strands

strings together two complementary RNA strands

17.

Why is DNA important for protein synthesis?

DNA is used as a source of amino acids to produce a protein

RNA molecules build a DNA strand that synthesizes a protein

DNA interacts with the RNA to add amino acids during protein synthesis

DNA is used as a template to produce RNA that is translated to a protein

18.

Which strand of the following identifies the process of forming a nucleic acid by using another molecule as a template and identifies its most common form?

translation - the synthesis of RNA using one strand of DNA

transcription - the synthesis of RNA using one strand of DNA

replication - the synthesis of proteins using one strand of RNA

protein synthesis - the synthesis of proteins using one strand of DNA

19.

During the process of protein synthesis, a section of the DNA molecule is copied into which other molecule?

nucleic DNA

cytoplasmic DNA

messenger RNA

transfer RNA

20.

Which sequence depicts the correct order of protein synthesis within a cell?

DNA --> mRNA --> amino acids --> proteins

DNA --> amino acids --> mRNA --> proteins

DNA --> mRNA --> proteins --> amino acids

DNA --> proteins --> amino acids --> mRNA

21.

Which BEST describes the interaction between DNA and RNA during protein synthesis?

RNA carries the code to the nucleus where DNA translates the code into a protein

DNA travels to the ribosome where RNA translates the code into a protein

RNA carries the code from the DNA in the nucleus to the ribosome for protein synthesis

DNA travels to the cytoplasm while RNA remains in the nucleus

22.

What process is shown in figure 8.3?

translation

replication

transcription

synthesis

23.

The process that converts an mRNA message into a polypeptide or amino acids

Translation

Mutation

Start Codon

Stop Codon

RNA

24.

A change in an organism's DNA