Paper 1 Practice (Biology)

Which definition of the magnification of a drawing of a leaf is correct?

• the actual size of the leaf multiplied by the magnification of the microscope

• the measured difference in size between the leaf and a drawing of the leaf

• the increase in size of the leaf when observed using a microscope

• the size of the drawing of the leaf divided by the actual size of the leaf

The electron micrograph shows parts of two cells.

Which labelled features identify these cells as eukaryotic?

• W, X and Y

• W and X only

• W only

• X only

Plant cells are stained and viewed using a microscope. The light source is natural light.

What could be clearly visible at x400 magnification?

• cristae of mitochondria

• grana of chloroplasts

• nucleoli

• ribosomes

• 1 and 4

• 2 and 5

• 3 and 4

• 3 and 6

Some secretory cells synthesize and release glycoproteins. What is the correct sequence of some of the events that occur in a secretory cell?

1 exocytosis

2 products accumulate in secretory vesicles

3 mRNA binds to ribosomes

4 synthesis of glycoproteins

• 3, 4, 1, 2

• 3, 4, 2, 1

• 4, 3, 1, 2

• 4, 3, 2, 1

What is the function of the type of organelle extracted in pellet 3?

• digestion of old cell organelles

• production of ATP by respiration

• synthesis of mRNA

• synthesis of protein

What is the general formula for amylose?

• (C5H10O5)n

• (C5H10O6)n

• (C6H12O6)n

• (C6H10O5)n

Tags

NGSS.HS-LS1-6

Which statement describes how the molecular structure of starch is suited to its function?

• Amylose has a branched structure and amylopectin is coiled to give a compact molecule for transport

• In the breakdown of amylose and amylopectin, many condensation reactions release stored energy

• In the formation of amylose and amylopectin, many hydrolysis reactions allow the release of stored energy

• Amylose and amylopectin form a complex that is insoluble and so does not affect the water potential of the cell

Which statement about the ratio of short fatty acids (4-16 carbon atoms) to long fatty acids (18 or more carbon atoms) in the milk of cows and whales is correct?

• The ratio in cow milk is higher because newborn cows need more energy than newborn whales

• The ratio in cow milk is lower because newborn cows need less energy than newborn whales

• The ratio in whale milk is higher because newborn whales need less energy than newborn cows

• The ratio in whale milk is lower because newborn whales need more energy than newborn cows

The structure of phospholipids includes:

1 polar phosphate heads

2 hydrophobic fatty and chains

3 saturated fatty acid chains

• 1 and 2

• 1 and 3

• 2 and 3

• 3 only