EOC Qs Practice 18

The nucleotide bases in a DNA molecule are connected by weak hydrogen bonds? Why do hydrogen bonds need to be weak?

• to sequence the bases

• for quicker translation process

• DNA double helix must be unzipped

• to open a space for RNA to copy a strand of DNA

Which of the following shows the steps by which proteins are coded and synthesized?

• RNA → DNA → protein

• DNA → RNA → protein

• protein→ DNA → RNA

• protein → RNA → DNA

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NGSS.HS-LS1-1

NGSS.HS-LS1-6

All of the following are correct pairs about the 4 organic molecules' functions EXCEPT

• lipids: long term energy, insulation

• carbohydrates: stores long term energy

• nucleic acids: store code for what proteins to make

• proteins: structure and biochemical reactions

Diffusion is the movement of molecules in and out of the cell from high to low concentration. Which of the following is an example of diffusion?

• osmosis: movement of water in and out of the cell

• movement of glucose inside the cell through a protein channel

• pumping out of potassium and sodium ion using ATP energy

Active transport uses ATP energy to move molecules in and out of the cell against a concentration gradient (from low to a high concentration area). Which is/are an example/s of active transport?

• osmosis: movement of water

• movement of glucose into the blood

• pumping out of sodium ion out of the cell

• pumping of potassium ion into the cell

Which best describes the translation process in protein synthesis?

• DNA to DNA

• DNA to tRNA

• mRNA to tRNA

• mRNA to amino acids

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NGSS.HS-LS1-1

How homeostasis is maintained by a buffer, osmosis, and active transport?

• buffer: maintains pH of human blood

• active transport: sodium-potassium pump

• diffusion: movement of molecules in and out of the cell

• osmosis: movement of molecules in and out of the cell

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NGSS.HS-LS1-3

Which of the following is most affected by the environment?

• height

• weight

• eye color

• blood type

Which best explains why smoking can lead to lung cancer?

• tobacco chemicals damage the sex cells

• tobacco chemicals change the sequence of DNA in lung cells

• external factors(such as chemicals in tobacco) damage the gametes

• external factors (such as chemicals in tobacco) influence gene expression

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NGSS.HS-LS3-2

How is ATP is used in homeostasis?

• by moving ions from high to low concentration

• by moving ions from low to high concentration

• active transport uses ATP to move ions against the concentration gradient

• active transport uses ATP to move ions from high to low concentration

Tags

NGSS.HS-LS1-3