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WorksheetsBIOL 1260 EXAM 2
Total questions: 32
Worksheet time: 34mins
What can be said about the action spectrum? You can bubble in more than one response for this question only. You may receive partial credit, but selecting one incorrect response will result in 0 points. This question is worth 2 points total.
It correlates to the amount of oxygen produced.
It trends higher as more pigments absorb light.
It always reaches 0 when all pigments stop absorbing light.
As it increases, sugar production increases as well.
It is best described as a measure of CO2 production.
What is the main purpose of light-dependent reactions of photosynthesis?
Which of the following occurs during the light reactions?
What is the primary function of the Calvin cycle?
What is meant by phenotypic plasticity in roots and shoots?
The sieve-tube and companion cells together form the ________.
Calculate the water potential of a cell with Ψ P = 1 MPa and Ψ S = −3 MPa. Indicate whether there will be an overall net movement of water into or out of the cell if that cell is placed into a beaker in which Ψ S = −3 MPa.
The transport of a water column up a very tall tree can be explained by _____.
Which of the following would tend to increase transpiration? You can bubble in more than one response for this question only. You may receive partial credit, but selecting one incorrect response will result in 0 points. This question is worth 2 points total.
Dry soil
An increased number of stomata
Spiny (thin) leaves
A lower potential in the air surrounding the stomata
A higher potential in the air surrounding the stomata
Which of the following is characteristic of ectomycorrhizal fungi (EMF)? You can bubble in more than one response for this question only. You may receive partial credit, but selecting one incorrect response will result in 0 points. This question is worth 2 points total.
EMF form a sheath around root cells.
EMF penetrate cell walls.
EMF release peptidases to help break down decaying material in the soil.
EMF hyphae resemble "small trees."
EMF fixes nitrogen, unlike arbuscular mycorrhizal fungi (AMF).
The image at right is illustrating _______.
The action of an antiporter
Tertiary active transport
Secondary active transport
Phloem unloading at the source
Phloem loading at the sink
Blood returning to the mammalian heart in a pulmonary vein drains first into the _____.
Right ventricle
Left ventricle
Right atrium
Left atrium
Pulmonary artery
Which of the following could be a source when it comes to sugar production in a plant?
a brand new leaf
a fully mature leaf doing photosynthesis
a root
a dying leaf late in autumn
none of the above
Which type of pigment is ineffective at absorbing red, orange, and yellow light (600 nm and greater)?
Chlorophyll a
Chlorophyll b
Carotenoids
All of them are ineffective
None of them are ineffective
a water column up a very tall tree can be explained by _____.
gravitational pull
cohesive and adhesive forces of the water column under evaporative tension
positive pressure in xylem that pushes water up
root pressure that pushes water up
We would expect the root system of a plant grown in a dry environment to ________.
Be short and shallow to minimize water absorption
Be long and extensive to minimize water absorption
Be short and shallow to maximize water absorption
Be long and extensive to maximize water absorption
Not show phenotypic plasticity
What event accompanies energy absorption by chlorophyll (or other pigment molecules of the antenna complex)?
A carboxylation reaction of the Calvin cycle occurs.
An electron is excited.
Electrons are stripped from NADPH.
ATP is synthesized from the energy absorbed.
What is a disadvantage of having small, needlelike leaves?
increased efficiency of light capture
decreased transpiration rate
decreased efficiency of light capture
increased transpiration rate
Most of the carbon dioxide produced by humans is ________.
bound to hemoglobin
converted to bicarbonate ions and protons (H+) by carbonic anhydrase, an enzyme in red blood cells
bicarbonate ions bound to hemoglobin
transported in the erythrocytes as carbonic acid
simply dissolved in the plasma
The large surface area in the small intestine directly facilitates _____.
Temperature regulation
Elimination
Filtration
Secretion
Absorption
According to the pressure-flow hypothesis of phloem transport, ________.
high turgor pressure in source sieve-tube elements pushes phloem sap to sink sieve-tube elements with low turgor pressure
the pressure in the phloem of a root is normally greater than the pressure in the phloem of a leaf
the combination of a high turgor pressure in the source and transpiration water loss from the sink moves solutes through phloem conduits
the formation of starch from sugar in the sink increases the osmotic concentration
water is actively transported into the source region of the phloem to create the turgor pressure needed
A small plant lives on a tree branch and penetrates its vascular system with haustoria; the small plant draws water and nutrients from the tree. This is an example of __________.
A epiphytic plant
A carnivorous plant
A haustoritic plant
A parasitic plant
A Yodarific plant
Why is breathing more difficult at high altitudes, such as at the top of Mount Everest?
The lower atmospheric pressure reduces the ability of the body to pump air into the body.
Carbon dioxide will not diffuse out of your body at high altitude.
The lower partial pressure of oxygen in the atmosphere reduces the rate of diffusion of oxygen into your body.
At high altitudes, the air only contains nitrogen, so breathing is more difficult.
Which of the following promotes oxygen release from hemoglobin?
A decrease in carbonic anhydrase activity
An increase in oxygen level
A decrease in temperature
A decrease in pH
An increase in the partial pressure of oxygen in tissue blood
Which of the following is completed by prokaryotes?
Providing nitrogen via arbuscular mycorrhizal fungi
Nitrogen fixation
The growth of ectomycorrhizal fungi
Carbon fixation
None of the above
Choose the correct statement from the list below.
Carbohydrate digestion begins in the mouth with salivary amylase.
Carbohydrate absorption occurs primarily in the large intestine.
Carbohydrates are fully digested after passage through the stomach.
Bile salts from the gall bladder are essential to the digestion of carbohydrates.
Which of the following would be considered part of the shoot system of a plant?
The leaves
The branches on a tree
The stem of a plant or the trunk of the tree
The roots
A-C are all parts of the shoot system.
Which of the following statements is FALSE regarding the image on the right?
It shows the absorption of glucose from the small intestine to the bloodstream.
It illustrates secondary active transport.
It illustrates facilitated diffusion.
The high concentration of Na+ in the cytoplasm keeps the Na+ - glucose co-transporter moving Na+ into the cytoplasm.
The ATPase represents primary active transport.
In mammals, gas exchange between the atmosphere and the pulmonary blood occurs in the ________.
Larynx
Alveoli
Bronchioles
Bronchi
Trachea
Why are there several structurally different pigments in the reaction centers of photosystems?
This arrangement enables the plant to absorb light energy of a variety of wavelengths.
They enable the plant to absorb more photons from light energy, all of which are at the same wavelength.
They enable the reaction center to excite electrons to a higher energy level.
Excited electrons must pass through several pigments before they can be transferred to electron acceptors of the electron transport chain.
Select which molecules should go in the numbered slots at right to complete the model.
1 - H2O; 2 - O2; 3 - CO2; 4 - ATP & NADPH
1 - O2; 2 - H2O; 3 - CO2; 4 - ATP & NADPH
1 - H2O; 2 - ATP & NADPH; 3 - CO2; 4 - O2
1 - CO2; 2 - O2; 3 - ATP & NADPH2; 4 - H2O
Match the following description/route with its appropriate term:
Symplastic - water travels in between the cell wall and cell membrane
Transmembrane - water travels from cell to cell via aquaporins (water channels)
Aposymplastic - water drifts (Tokyo drifts 😊) from cell wall to cell cytosol
Apoplastic - water travels in the cell walls
Casparian route - water travels along the waxy Casparian strip and permeates the cell
