Thompson Biology

In the 1940s scientists performed an experiment that ultimately identified the site of protein synthesis. They also identified the molecule responsible for transporting information from the nucleus to the site of protein synthesis. What was this newly identified molecule?

• A gene

• mRNA

• ATP

• Thymine

Which process and product are represented in Diagram 2?

• Process: transcription; product: mRNA

• Process: translation; product: protein

• Process: replication; product: tRNA

• Process: recombination; product: polymerase

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NGSS.HS-LS1-1

Which two processes does this diagram most directly model?

• Energy conversions and synthesis of new molecules

• Synthesis of new molecules and homeostasis

• Transport of molecules and energy conversions

• Homeostasis and transport of molecules

Cells pass through a G2 checkpoint before entering mitosis. Ideally, if DNA damage is detected, the cells do not enter mitosis until the damage is repaired. Why is DNA damage repaired before cells enter mitosis?

• So that another round of DNA synthesis does not have to take place

• So that the chromosomes can align at the metaphase plate during mitosis

• So that the cytoplasm can be divided equally between the two daughter cells

• So that healthy daughter cells are produced, allowing the organism to continue growing

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NGSS.HS-LS1-4

Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown. Which DNA strand is complementary to the one shown above?

• AGU GCU GCG CGU A

• TGT AGC TGC GCG T

• ACA TCG ACG CGC A

• TCG CGC AGC TAC A

A single-celled organism can be classified as a prokaryote based on the absence of —

• a cell membrane

• ribosomes

• chromosomes

• a nucleus

Which statement describes the mutation in the diagram?

• A silent mutation results in the insertion of a different amino acid.

• A substitution occurs with the adenine base.

• A deletion of cytosine base occurs

• A base inserted into one strand of the DNA

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NGSS.HS-LS3-2

Which table correctly identifies the four most-abundant elements in biomolecules?

• 
• 
• 
• 

What is the purpose of this process this process?

• To replicate the DNA of an organism before cell division

• To assemble nucleotides in an mRNA chain along a DNA template

• To synthesize amino acids used to unzip strands of DNA and copy the genetic code

• To translate the genetic code into a specific sequence of amino acids

Tags

NGSS.HS-LS1-1

Which statement describes this model of DNA?

• The model is inaccurate because the base pairs are incorrect.

• The model is accurate because it contains correctly paired bases.

• The model is accurate because it shows each base splitting to form a double helix.

• The model is inaccurate because some typical bases in

  DNA are missing.

Tags

NGSS.HS-LS1-1