NEW
Font size
WorksheetsRecombinant DNA and Earth's History Quiz
Total questions: 15
Worksheet time: 8mins
A scientist wants bacteria to produce human insulin for diabetic patients. Which action best represents recombinant DNA technology?
Injecting insulin directly into bacteria
Combining human insulin gene with bacterial DNA
Growing bacteria in sugar solution
Allowing bacteria to mutate naturally
A student inserts a human gene into a plasmid before transferring it into a bacterium. What is the main purpose of the plasmid?
To destroy harmful genes
To act as a carrier of foreign DNA
To increase bacterial size
To prevent gene expression
During a laboratory experiment, restriction enzymes are used. Why are these enzymes important in recombinant DNA technology?
They heat DNA to high temperature
They copy DNA repeatedly
They cut DNA at specific sequences
They repair damaged DNA
A biotechnology company produces insulin using genetically modified E. coli. Why are bacteria commonly used in recombinant DNA experiments?
They are multicellular
They grow slowly
They are easy to culture and reproduce quickly
They cannot accept foreign DNA
If a ligase enzyme is not added during recombinant DNA formation, what is most likely to happen?
DNA will be cut into many fragments
Foreign gene will not join the plasmid
Bacteria will die immediately
Protein synthesis will increase
A farmer plants crops engineered to resist insect pests. Which benefit of recombinant DNA technology is shown in this situation?
Reduced crop growth
Increased pesticide use
Improved agricultural productivity
Loss of genetic diversity
A gene from a jellyfish is inserted into a mouse, causing it to glow under UV light. This organism is best described as:
Clone
Hybrid
Transgenic organism
Mutant species
Which situation best shows a possible ethical concern related to recombinant DNA technology?
Producing vaccines using bacteria
Studying DNA in the laboratory
Altering genes that may affect future generations
Growing bacteria in nutrient broth
Fossils of simple single-celled organisms are found in the oldest rock layers. In which eon did life first appear?
Phanerozoic
Paleozoic
Proterozoic
Archean
A student observes fossils of dinosaurs in a rock layer. These fossils most likely belong to which era?
Cenozoic
Mesozoic
Paleozoic
Precambrian
After examining rock layers, scientists find evidence of the first land plants and insects. Which era does this indicate?
Cenozoic
Mesozoic
Paleozoic
Archean
A mass extinction wiped out the dinosaurs about 66 million years ago. This event marks the end of which era?
Paleozoic
Mesozoic
Cenozoic
Proterozoic
Mammals became the dominant land animals after the extinction of dinosaurs. In which era did this occur?
Mesozoic
Paleozoic
Archean
Cenozoic
A geologist discovers rock layers rich in marine fossils such as trilobites. These organisms were most common during the:
Cenozoic Era
Mesozoic Era
Paleozoic Era
Proterozoic Era
When teaching about Earth’s history, a teacher emphasizes that the longest span of time with very little complex life is called the:
Cenozoic Era
Mesozoic Era
Paleozoic Era
Precambrian Time
