Cell bio remote revision

tick two ways you can tell the difference between prokaryotic and eukaryotic cells

• the prokaryotic cells have a nucleus

• the eukaryotic cells have a nucleus

• prokaryotic cells don't have ribosomes

• prokaryotic cells have a cell wall but eukaryotic cells don't

• prokaryotic cells are smaller than eukaryotic cells

Ribosomes are important in a cell because they......

• control what goes in and out of a cell

• they are the site of aerobic respiration which provides energy for the cell

• they produce proteins like enzymes and hormones for the cell

• they are involved in photosynthesis

Give two adaptations of the different cells of the small intestine

• they have many mitochondria

• they have many ribosomes

• they quickly divide and multiply

• they are adapted for digestion

which is the correct definition of a high water potential

• lots of water molecules in a given area

• lots of sugar molecules in a given area

• less water and more sugar molecules in a given area

• high amounts of sugar in a water like substance

tick two boxes to describe how plants absorb water and minerals from the soil

• the xylem vessel absorbs the water by osmosis

• there are many mitochondria in root hair cells to provide energy for active transport

• the root hair cells are adapted for diffusion of substances across the cell membrane

• the root hair cells are adapted by having a large surface area

Tick one adaptation which allows a concentration gradient to be maintained between the capillaries and the alveoli

• reduced blood in the capillaries

• a large surface area

• alveoli being one cell thick

• increased blood flow to the capillaries

what happens before cell division starts?

• the chromosomes split up

• the chromosomes line up along the equator

• the cell grows and makes more of the substances it needs

• mitosis happens

what happens to the DNA in a nucleus at the start of cells division

• the DNA copies itself

• the chromosomes are pulled apart

• the DNA is pulled apart to make two strands

how do you calculate the time it takes for cells to carry out cell division?

• count them

• count the cells you see going through division and divide it by the number of cells then multiply by the time it takes

• use a stopwatch to time how long the cells take to go through cell division

• use a microscope and a stopwatch to time how long the cells take and how many cells are dividing

which types of cells will be going though the fastest rate of cell division? (two boxes)

• muscle cells

• cancer cells

• palisade cells

• root hair cells