Biology EOC Review #11

What is the function of chlorophyll in plants?

• it synthesizes ATP

• it allows for gas exchange

• it breaks water molecules

• it absorbs light energy

The ribosomes in the cells of herbivores use amino acids to make proteins. What is the source of carbon, hydrogen, and oxygen atoms needed by herbivores to synthesize amino acids?

• the air they breathe

• the plants that they eat

• the animal tissues that they eat

• the water they drink

This is an ATP molecule. What occurs that provides energy to an organism from this ATP molecule?

• a bond forms to connect a fourth phosphate to an ATP molecule

• a bond that connects the adenine to the ribose sugar is broken

• a bond forms between one ATP molecule and another one

• a bond that connects one of the phosphates is broken

Why do cells need both tRNA and mRNA?

• Only mRNA can be used to repair mistakes in the DNA sequence.

• Only tRNA bends into a shape that can carry specific amino acids

• The tRNA in used on the ribosomes and the mRNA is used in the nucleus

• The mRNA brings information to the nucleus for the tRNA to use.

Look at the cross section of a cell membrane of a eukaryotic cell. H+ ions are being pumped from

a low concentration to a high concentration.

How do you describe this type of transport across the cell membrane?

• Active transport

• Passive transport

• Facilitated Diffusion

• Co-transport

How are sexual reproduction and asexual reproduction different from each other?

• sexual reproduction requires two parents and asexual reproduction requires

  only one parent

• asexual reproduction requires two parents and sexual reproduction requires

  only one parent

• mutation rates are lower in sexual reproduction than in asexual reproduction

• asexual reproduction occurs only in multicellular organisms

The chemical colchicine disrupts cell division. Which cell process would most likely stop if colchicine were added to a culture of human liver cells?

• mitosis

• meiosis

• crossing over

• active transport

What carries the instructions for making amino acids in a protein?

• the nitrogen base on the tRNA

• the hydrogen bonding between nitrogen bases

• the sequence of nitrogen bases on the mRNA

• the nitrogen base bonding on the DNA molecule

Diffusion of a molecule can only occur if which statement is true?

• The cell has a DNA sequence that codes for that molecule

• There is a need for that molecule inside the cell's cyotoplasm

• That molecule is large and polar

• There is a higher concentration of that molecule on one side of the plasma membrane than the other

Where in the cell does cell respiration occur?

• chloroplast 
• central vacuole 
• mitochondria
• cell membrane