Random

Question 1

Pores where water is lost in a leaf?

Answer 1

Stomata

Question 2

How are guard cells adapted to their role?

Answer 2

Can change shape/bend, unevenly thickened cell wall

Question 3

Bar cohesion, how does water go from the roots to the leaf?

Answer 3

Evaporation at top of plant creates tension in xylem, pulling the water up

Question 4

What cell division does yeast undergo?

Answer 4

Budding

Question 5

Which out of yeast, animals, plants and bacteria have ribosomes?

Answer 5

All of them!

Question 6

What is the tissue type that undergoes division to get undifferentiated plant cells?

Answer 6

Meristemic

Question 7

Which organelles are not found in mature xylem vessels?

Answer 7

Cytoplasm or nucleus

Question 8

What is special about the structure of cell walls in xylem vessels?

Answer 8

Lignified, thicker, have bordered pits

Question 9

Three types of cell found in phloem tissue?

Answer 9

Sieve tube element, companion cell, parenchyma

Question 10

Name two types of epithelium?

Answer 10

Squamous, ciliated

Question 11

How do alveoli create a short diffusion pathway for efficient gas exchange?

Answer 11

1 cell thick wall (short diffusion pathway), epithelium provide short DP also

Question 12

How does alveoli help gas exchange?

Answer 12

Elastic so recoil, maintain concentration gradient for diffusion, small SA to volume ratio

Question 13

What apparatus is used to measure ventilation?

Answer 13

Spirometer

Question 14

What is the plasma membrane containing?

Answer 14

Phospholipid bilayer, containing proteins (glycoproteins stick out of bilayer)

Question 15

How does high temperature effect the plasma membrane?

Answer 15

Bilayer becomes fluid, phospholipids vibrate, move and their KE is increased

Question 16

If the atria contracted twice instead of once per cycle, one after the other, how would it effect blood output?

Answer 16

Lower blood out put per contraction, atrium cannot refill with blood

Question 17

How can fetus’ breathe?

Answer 17

A fetus’ lungs do not function, blood is not oxygenated in their lungs but in the placenta from their mother

Question 18

Does fetal or adult haemoglobin have a higher affinity for O2?

Answer 18

Fetal haemoglobin has a higher affinity for O2 as fetal must bind to O2 in lower partial pressure (in placenta)

Question 19

What does smooth endoplasmic reticulum do?

Answer 19

Transport and synthesise lipids/fats/carbs

Question 20

What do lysosomes do?

Answer 20

Contain hydrolysing enzymes or break down pathogens

Question 21

Mitosis order?

Answer 21

People may attack the cunt

Question 22

How to work out percentages?

Answer 22

Small/big x 100

Question 23

How to identify a non-reducing sugar?

Answer 23

Don’t have an OH group, so cannot reduce other compounds

Question 24

What sugars are reducing sugars?

Answer 24

All monosaccharides, some disaccharides

Question 25

Which sugars are non-reducing sugars?

Answer 25

Sucrose

Question 26

What is a non reducing sugar?

Answer 26

A sugar that cannot donate electrons to other molecules and therefore cannot act as a reducing agent

Question 27

What is ammonia?

Answer 27

A colourless gas, with strong smell - dissolves in water to make a strongly alkaline solution