Sachith Keragala's Biology Quiz
Sachith Keragala's Biology Challenge
Welcome to Sachith Keragala's custom made A/L biology quiz! This engaging quiz will test your knowledge on various topics from the G.C.E Advanced Level Biology syllabus.
With 27 stimulating multiple-choice questions, you will have a time limit of 30 seconds for each question. Compete with yourself and see how well you understand biology!
- Test your knowledge of key concepts
- Challenge yourself with timed questions
- Track your performance and learn from feedback
Welcome to Sachith Keragala's custom made A/L biology quiz. Thank you for being a correspondent of this survey. You will be asked 25 Multiple Choice Questions from the G.C.E Advanced Level Biology syllabus, each containing one answer. You have a time limit of 30 seconds to answer each question.....Soo. Good Luck and Thank you once again!!
Which of the following statements of comparison between proteins and DNA is incorrect?
Both of them are heteropolymers.
DNA forms a helical structure while proteins do not have helical structures.
Denaturation of proteins is usually irreversible while denaturation of nucleic acids is reversible
Both of them are denatured by higher temperature and extreme pHs
DNA and proteins both have internal H-bonds to stabilize the structure
Which of the following animals has the largest number of openings through which blood flows into the heart?
Shark
Starfish
Cockroach
Toad
Man
Five types of species considered in Biodiversity conservation are given below. A – Vulnerable species B – Endangered species C – Critically Endangered species D – Extinct in the wild What is the correct order of these species according to the importance of their conservation priority?
A > B > C > D
B > C > D > A
D > C > B > A
B > D > C > A
C > D > B > A
Of the following animals, which one excretes the most diluted urine
Tilapia
Tortoise
Tuna
Sea turtle
Otter
Which of the following is incorrect regarding stomata?
Guard cells are sensitive to the concentration of CO2 in the intercellular spaces of leaf
Transport of ions across cell membrane is mainly responsible for stomatal mechanism.
Guard cells of some monocots are not kidney shaped
In some plant species stomata open at night.
Increasing ABA concentration in a leaf results in the opening of stomata
If a needle is inserted through the wall of the descending colon, which one of the following tissues may not be penetrated?
Mucosa
Submucosa
Longitudinal muscles
Circular muscles
Serosa
Which of the following is an incorrect statement regarding respiratory metabolism?
In the oxidation of fats acetyl Co-A is an important intermediate.
Krebs cycle intermediates can be used in the synthesis of aminoacids
Oily seeds require less oxygen in respiration than starchy seeds
Substrate level phosphorylation is essential for use of glucose in respiration.
Synthesis of ATP by mitochondria is associated with a proton pump mechanism.
Given below are some characteristic features associated with life. Which of these features cannot be observed within one individual organism?
Irritability
Evolution
Reproduction
Heredity
Adaptation
While fats and oils are insoluble in water soaps manufactured using oils are soluble in water. Which of the following is the major reason for this change of property?
Low molecular weight of the lipid molecules found in soap.
Shorter length of hydrocarbon chains.
Increased polarity of lipid molecules.
Presence of free glycerol in soap.
Fully saturated carbon-carbon bonds of the lipid molecules.
Which of the following is not a common function of the Golgi complex?
Receiving proteins made by the endoplasmic reticulum.
Making lysosomes.
Chemical modification of protein molecules.
Making ribosomes.
Transport of vescicles.
Which of the following substances is unlikely to be transported through phloem?
Cytokinin
Vitamins
Amino acids
Weedicides
Mineral ions
In a normal healthy adult man, the amount of water reabsorbed in the kidney as a % of the amount filtered is about
99%
80%
50%
20%
1%
If the Net Primary Productivity of an ecosystem with 4 trophic levels is 9000 KJ m-2 year-1 and the amount used for respiration by primary producers is 860 KJ m-2 year-1 , the gross primary productivity of this ecosysytem is
9000 - 860 KJ m-2 year-1
9000 + 860 KJ m-2 year-1
9000 – 4(860) 860 KJ m-2 year-1
9000 + 4(860) 860 KJ m-2 year-1
9000 - 3(860). 860 KJ m-2 year-1
Which of the following statements is incorrect? When a leaf of a sugar cane plant is exposed to sunlight,
PSII light reactions occur in mesophyll cells.
PSI and PSII light reactions occur in bundle sheath cells
Mesophyll cells produce malate
Bundle sheath cells produce pyruvate
Malate and pyruvate are transported through plasmodesmata.
Which of the following is common to land snail, a clam and an octopus?
Cephalization
Mantle
Radula
Gills
Shell
Which statement is false regarding this animal?
It has an open circulatory system
It has a radula
It posses nephridia
The largest invertabrate belongs to this family
It has an endoskelton
Who discovered the pressure flow hypothesis of phloem transport?
Ernest Munch
Joly and Dixon
Perkinje
Eiichi Kurosawa
B.J Watson
Which is the theoretical number of chemically different dipeptides that may be assembled from 12 different amino acids?
24
72
144
36
64
Which of the following phyla contains homosporous seedless plants with vascular tissues and photosynthetic gametophytes which are not dependent on the sporophytes?
Bryophyta
Lycophyta
Pterophyta
Cycadophyta
Coniferophyta
Select the animal which has a lateral line
0%
0
0%
0
0%
0
0%
0
0%
0
Which is the incorrect statement about the plan to which the above diagram belongs to?
A pith is absent in root
A perianth is present
A petiole is present in leaf
Vascular bundles are arranged in a ring in the stem
Flower parts are tetramerous or pentamerous
Which is found in the thorasic cavity?
Thymus
Spleen
Larnyx
Illiac arteries
Hyoid bone
Which is the incorrect statement regarding respiration?
It is the mechanical process that moves air in and out of lungs
The diaphragm relaxes during inspiration
Under resting conditions, expiration is a passive process
Normal respiration may be rhythmic and involuntary.
Pneumotaxic center stimulates deep expiration
In a sarcomere, both actin and myosin filaments can be seen in the
H Zone.
I Band.
A Band.
M Line.
Z Line.
A feature present in this animal is
A cloaca
Endodermally derived endoskeleton
Twelve cranial nerves
A single solid nerve cord
A haemocoel
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