In which condition can oxyhaemoglobin easily dissociate?
Low pH
Low carbon dioxide concentration
Low hydrogen ion concentration
High concentration content
masalah 2
pilihan
Which factor most significantly increases the breathing rate in mammals?
Reduction of oxygen concentration in the blood
Increase of carbon dioxide concentration in the blood
Reduction of oxygen in the alveolus
Increase of carbon dioxide in the alveolus
masalah 3
pilihan
Which process in the erythrocytes is catalyzed by carbonic anhydrase?
Formation of haemoglobinic acids
Formation of carbonic acid from water and CO2
Formation of carbaminohaemoglobin
Formation of oxyhaemoglobin
masalah 4
pilihan
What is the definition of the cardiac cycle?
The contraction of the atria
The sequence of events during one heartbeat
The contraction and relaxation of the ventricles
The circulation of blood in the heart during one heartbeat
masalah 5
pilihan
Which statement about atrial systole is incorrect?
Atrial pressure is higher than ventricular pressure
The atria contract
Atrioventricular valves open
Atrioventricular valves close
masalah 6
pilihan
Where can water not pass via the apoplast pathway in plant roots?
Pericycle
Vascular tissue
Endodermis
Cortex
masalah 7
pilihan
What does the P wave in an ECG represent?
Ventricular depolarization
Atrial depolarization
Atrial repolarization
Ventricular repolarization
masalah 8
pilihan
Which part of a plant functions as a source during translocation?
Meristematic tissue in the shoot
Leaves
Roots
Fruits and flowers
masalah 9
pilihan
What causes the second 'dub' sound in the heart?
Closed atrioventricular valves
Open atrioventricular valves
Closed semilunar valves
Open semilunar valves
masalah 10
pilihan
What is an organ called that corrects a deviation from homeostasis?
Receptor
Control center
Effector
Sensor
masalah 11
pilihan
Flattened sacs of internal membranes associated with photosynthesis are called:
Chloroplasts
Stroma
Cristae
Thylakoids
masalah 12
pilihan
In green plant photosynthesis, the electron donor for the light-dependent reaction is:
Carbon dioxide
Oxygen
RuBP
Water
masalah 13
pilihan
Which of these molecules is NOT the product of photosynthesis?
Oxygen
Carbon dioxide
Glucose
NADP+
masalah 14
OX
Light-dependent reaction involves both cyclic and non-cyclic photophosphorylation. Is the statement correct?
masalah 15
pilihan
The photosystem channels the excitation energy gathered by the absorption of light to a specific 'reaction center chlorophyll', which in turn passes the energy to:
Photosystem I
Photosystem II
Primary electron acceptor
Cytochrome
masalah 16
pilihan
What is the final product of the Calvin cycle?
RuBP
PGA
ATP
G3P
masalah 17
pilihan
Which of the following is mismatched?
PGA: A three-carbon compound
CAM plants: Stomata open during the day and closed at night to avoid photorespiration
Chemiosmosis: ATP synthesis is coupled to electron transport
C4 plants: Expend ATP to concentrate CO2 in bundle sheath cells to avoid photorespiration
masalah 18
pilihan
Which of the following are the first products in the C3 and C4 pathway respectively?
Ribulose-1,5-bisphosphate; malic acid
Malate; carbon dioxide
3-phosphoglycerate; oxaloacetate
Glyeraldehyde-3-phosphate; phosphoenolpyruvate
masalah 19
jawapan pendek
How many molecules of NADPH and ATP are required to produce one molecule of glucose from six molecules of carbon dioxide via photosynthesis?
12 NADPH and 18 ATP
masalah 20
pilihan
What molecule is produced as a byproduct of the light-dependent reactions of photosynthesis?