CFA #1 DNA Structure & Replication (11.1, 11.2, & 11.3)

Frederic Griffith discovered transformation in his experiments on mice and Pneumococcus bacteria. He injected the mice with combinations of harmless, R-strain bacteria and disease-causing S-strain bacteria. Which combination of bacteria killed the mice and showed that transformation occurred?

• heat-killed R-strain and live S-strain
• heat-killed S-strain and live R-strain
• heat-killed bacteria of both strains
• live bacteria of both strains

Tags

NGSS.HS-LS3-2

Scientists wanted to learn more about Griffith’s experiment. They extracted a mixture of various molecules from the heat-killed bacteria. They found that ________ no longer occurred when they treated the mixture with enzymes that destroyed (carbohydrates / proteins / RNA / DNA / lipids). This experiment supports the hypothesis that (carbohydrates / proteins / RNA / lipids / DNA) is the genetic materia

• translation
• transcription
• transformation

Tags

NGSS.HS-LS3-1

Scientists wanted to learn more about Griffith’s experiment. They extracted a mixture of various molecules from the heat-killed bacteria. They found that (translation / transcription / transformation) no longer occurred when they treated the mixture with enzymes that destroyed _______. This experiment supports the hypothesis that (carbohydrates / proteins / RNA lipids / DNA) is the genetic material.

• carbohydrates
• proteins
• RNA
• DNA
• lipids

Scientists wanted to learn more about Griffith’s experiment. They extracted a mixture of various molecules from the heat-killed bacteria. They found that (translation / transcription / transformation) no longer occurred when they treated the mixture with enzymes that destroyed (carbohydrates / proteins / RNA / DNA / lipids). This experiment supports the hypothesis that _________ is the genetic material.

• carbohydrates
• proteins
• RNA
• lipids
• DNA

Which statements describe a bacteriophage? Select TWO (2) correct answers.

• It is a type of virus that infects bacteria.
• It is a type of bacteria that infects viruses.
• It is a virus consisting of a protein coat and a DNA core.
• It is a bacterial strain consisting of protein and a DNA core.

What are three tasks that DNA must be able to perform in all organisms? Select THREE (3) correct answers

• It must store genetic information.
• It must discard foreign genes.
• It must instruct cells to produce needed molecules.
• It must copy itself.
• It must move to locations throughout the cell.

Tags

NGSS.HS-LS1-1

When does transformation occur?

• when an organism receives foreign RNA that is transformed into DNA
• when DNA is transformed into RNA
• when bacteria are killed with heat
• when a cell receives foreign DNA that is expressed as a new characteristic

A nucleotide of DNA may contain adenine, guanine, cytosine, or thymine. What is each of these components?

• 5-carbon sugar
• nitrogenous base
• phosphate group
• nucleic acid

The image shows a nucleotide, a building block of the DNA molecule. From left to right, what are the names of the parts?

• 5-carbon sugar, nitrogenous base, phosphate group
• nucleic acid, 5-carbon sugar, amino group
• 5-carbon sugar, nitrogenous base, carboxyl group
• nitrogenous base, 5-carbon sugar, phosphate group

Tags

NGSS.HS-LS1-1

Label the nucleotide

a

b

c

Phosphate

Nitrogenous base

Sugar