Cells - Genetics
Showing posts with label Cells - Genetics. Show all posts
Showing posts with label Cells - Genetics. Show all posts

The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. because other substances are blocked from entering, this membrane is called:

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The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. because other substances are blocked from entering, this membrane is called:




a. perforated
b. semi-permeable
c. non- conductive
d. permeable


Answer: b. semi- permeable

A researchers is studying a particular disease-causing agent. the agent has a capsid (protein coat), lacks a organelles, and can reproduce only when it is inside an animal cell. Which answer choice below should the researcher classify the agent?

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A researchers is studying a particular disease-causing agent. the agent has a capsid (protein coat), lacks a organelles, and can reproduce only when it is inside an animal cell. Which answer choice below should the researcher classify the agent?




a. bacterium
b. fungus
c. virus
d. protist


Answer: c. virus

Which event occurs during the G1 phase?

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Which event occurs during the G1 phase?




a. DNA replication
b. breakdown of the nuclear membrane
c. formation of the mitomic spindle
d. growth of the cell.


Answer: growth of the cell

Which set of characteristics below describes a carbohydrate?

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1. inorganic

2. supplies energy and fiber

3. component of plant cell walls

4. part of DNA

5. made of nucleotides


Which set of characteristics below describes a carbohydrate? 



a. 1,3 and 5
b. 2,3 and 4
c. 2,4 and 5
d. 1,3 and 4


Answer: b. 2,3 and 4

Which substance represented in the data table above is a carbohydrate?

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Unknown substance: chemical formula
1 CO2
2 NH3CH2COOH
3 C6H12O6
4 C11H80NO8P

Which substance represented in the data table above is a carbohydrate?




a. unknown substance 1
b. unknown substance 2
c. unknown substance 3
d. unknown substance 4


Answer: c. unknown substance 3

Individuals with HIV sometimes contract pneumonia infections that are rare in the rest of the population because people with HIV:

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Individuals with HIV sometimes contract pneumonia infections that are rare in the rest of the population because people with HIV: 




a. are unable to fight off these pneumonia- causing organisms
b. are more often exposed to these pneumonia- causing organisms
c. release pheromones that attract the pneumonia- causing organism
d. release substances that increase the strength of the pneumonia- causing organisms


Answer: a. are unable to fight off these pneumonia- causing organisms

A biologist observes that some cells are growing faster than others in a tissue culture. a week later, the scientist notices that the fast- growing cells have tripled in number.This observation is a possible clue that the fast- growing cells-

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A biologist observes that some cells are growing faster than others in a tissue culture. a week later, the scientist notices that the fast- growing cells have tripled in number.This observation is a possible clue that the fast- growing cells- 




a. have killed the slow-growing cells
b. were exposed to antibiotics or chemical
c. contain an unknown enzyme
d. have disruptions in their normal cell cycle


Answer: d. have disruptions in their normal cell cycle

Which statement below describes how the genetic code is common to all organisms?

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Which statement below describes how the genetic code is common to all organisms?


a. all organisms have the exact same genetic code
b. all organisms use the same nucleotides
c. all organism contain the same DNA
d. all organisms have the same proteins


Answer: b. all organisms use the same nucleotides

Fireflies produce light inside their bodies. the enzyme luciferase is involved in the reaction that produces the light. scientists have isolated the luciferase gene. During an investigation, a scientist inserts the luciferase gene into DNA of cells from another organism. when these cells produce light, the scientist knows Which event below has occurred?

13:28

Fireflies produce light inside their bodies. the enzyme luciferase is involved in the reaction that produces the light. scientists have isolated the luciferase gene. During an investigation, a scientist inserts the luciferase gene into DNA of cells from another organism. when these cells produce light, the scientist knows Which event below has occurred?



a. the luciferase gene was transcribed and translated
b. the luciferase gene mutated inside the cells
c. the luciferase gene destroyed the original genes of the cells
d. the luciferase gene moved from nucleus to a vacuole


Answer: a. the luciferase gene was transcribed and translated

mustard gas removes guanine (G) from DNA. For developing embryos of many organisms, exposure to mustard gas can cause serious deformities because guanine:

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mustard gas removes guanine (G) from DNA. For developing embryos of many organisms, exposure to mustard gas can cause serious deformities because guanine:




a. store the building blocks of proteins
b. supports the structure of ribosomes
c. produces energy for genetic transfer
d. is part of all organisms' genetic code


Answer: d. is part of all organism's genetic code

Which is the correct order?

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Which is the correct order?

a. nuclear membrane formation around each set of newly formed chromosomes
b. separation of centromeres
c. replication of each chromosome
d. movement of single-stranded chromosomes to opposite ends of the spindle

a. C-B-D-A
b. A-B-C-D
c. C-D-B-A
d. D-C-A-B


Answer: a. C-B-D-A

people who have been exposed to excessive radiation often experience mutations. if there mutations only occur in somatic ( body) cells, these people may:

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people who have been exposed to excessive radiation often experience mutations. if there mutations only occur in somatic ( body) cells, these people may:




a. pass on these mutations to their offspring
b. experience an increased risk of cancer
c. develop entirely new DNA sequences in all cells
d. experience difficulties replicating RNA


Answer: b. experience an increased risk of cancer

what is the typical sequence of event in lytic viral reproduction?

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what is the typical sequence of event in lytic viral reproduction?



a, penetration, attachment to receptor proteins, replication, reassembly
b. attachment to receptor proteins, reassembly, replication, penetration
c. reassembly, attachment to receptor proteins, replication, penetration.
d. attachment to receptor proteins, penetration, replication, reassembly


Answer: d. attachment to receptor proteins, penetration, replication, reassembly

Which statement below best summarizes the primary difference between cells and viruses?

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Which statement below best summarizes the primary difference between cells and viruses?




a. all cells are prokaryotes, while viruses are eukaryotes
b. all cells are eukaryotes, but viruses are not made of cells
c. cells can carry out life functions, but viruses cannot.
d. viruses can carry out life functions, but bacteria cannot.


Answer: c. cell can carry out functions, but viruses cannot

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