Which process requires energy to bring molecules across the cell membrane?

facilitated diffusion

passive transport

active transport

passive diffusion

List the structures and fluids through which light passes as it travels from cornea to the retina

Gene expression in all organisms depends on protein synthesis. What is the last stage in protein synthesis, in which amino acids are assembled by tRNA? A: assembly B: is crossed off C: transcription D: translation

A snickers® candy bar contains 280 calories, of which the fat content accounts for 120 calories. what is the energy of the fat content, in kj? (1 cal = 4.184 j)

Which of the following most accurately describes the setting that created the need for antiknock compounds in gasoline and new refrigerants in air conditioners and refrigerators, as described in the video? a.

Which of the following provide evidence that South America, Africa, Antarctica, and Australia were once together as one supercontinent? Select the three correct answers. Cratons match across the edges of continents.

Which is true of mitosis

5. The blob operon produces enzymes that convert compound A into compound B. The operon is controlled by a regulatory gene S. Normally these enzymes are synthesized only in the absence of compound B.

What is the result of a dietary protein deficiency? increased synthesis of proteins a weakened immune system enhanced nutrient absorption increased bone turnover decreased breakdown of body protein

A student and teacher working together to answer an experimental question is an example of

Explain how the Earth's rotation and revolution about the Sun affect its shape and is related to seasons and tides.