DrBESTJC:
Quick Revision Questions In BIOLOGY

Answer all 25 questions in 20 minutes !

Test of Speed and Accuracy

Typical UI PostUTME Questions


1) The cell of an onion bulb can be differentiated from a cheek cell by the presence of:
A) Plasmalemma
B) Chloroplast
C) Cell wall *
D) Nucleus

2) The membrane surrounding the vacuole in a plant cell is called the:
A) Plasmalemma
B) Tonoplast *
C) Nuclear Membrane
D) Endoplasmic reticulum

3) The pioneer organisms in ecological succession are usually the :
A) Lichens *
B) Algae
C) Ferns
D) Mosses

4) The umbrella-shaped fruiting body of a fully developed muchroom is the :
A) Mycelium
B) Basidium
C) Pileus *
D) Stipe

5) The Cnidoblast cells found in Hydra are used for :
A) Reproduction
B) Offence and Defence *
C) Locomotion and Nutrition
D) Food collection

6) In Spirogyra, the Pyrenoid :
A) Excretes wastes products
B) is suspended to cytoplasmic strands
C) is mainly used for respiration
D) makes the plant skinny to touch
E) usually contains starch *

7) Amoeba moves by means of :
A) Cilia
B) Flagella
C) Pseudopodia *
D) swimmerets

8 ) Which one of the following animals is NEVER secondary host of tapeworms ?
A) Cow
B) Fish
C) Pig
D) Man *
E) Bat

9) The mosquito that transmits elephantiasis in humans is the :
A) Male Culex
B) Female aedes
C) Male aedes
D) Female Culex *

10) In tilapia, the fins lying just behind the gill covers are :
A) Caudal
B) Pectoral *
C) Pelvic
D) Anal

11) The mammalian organ through which nourishment and oxygen diffuses into a developing embryo is called :
A) Amnion
B) Chorion
C) Umbilical cord
D) Oviduct
E) Placenta *

12) The mammalian vein which starts with and ends in a capillary network is the :
A) Pulmonary Vein
B) Mesenteric Vein
C) Renal Vein
D) Hepatic Portal Vein *

13) The mode of nutrition in which digestion is extracellular is :
A) Holophytic
B) Parasitic
C) Holozoic
D) Saprophytic *

14) Insectivorous plants trap and kill their prey to derive :
A) Phosphorus
B) Calcium
C) Nitrogen *
D) Zinc

15) A young plant showing yellowing of leaves is likely to be deficient in :
A) Calcium
B) Magnesium *
C) Potassium
D) Boron
E) Molybdenum

16) Which vitamin plays an important role in blood clotting ?
A) Vitamin A
B) Vitamin K *
C) Vitamin B
D) Vitamin C

17) The part of the stomach nearer the gullet is called the :
A) Epiglottis
B) Cardiac Sphincter *
C) Duodenum
D) Pyloric Sphincter

18) The digestive enzyme that coagulates proteins in milk is :
A) Ptyalin
B) Pepsin
C) Renin *
D) Trypsin
E) Amylase

19) The mammalian heart chamber that pumps blood through the longest distance is the :
A) Right Auricle
B) Right Ventricle
C) Left Ventricle *
D) Left Auricle

20) Excess water in plants is excreted as water vapour and as droplets respectively through :
A) Respiration and Guttation
B) Transpiration and Guttation *
C) Photosynthesis and Guttation
D) Guttation and condensation.

21) An organism with double circulation is the :
A) Duck
B) Rat *
C) Toad
D) Lizard

22) The glottis is the opening which leads to the :
A) Oesophagus
B) Larynx *
C) Nostrils
D) Pharynx
E) Mouth

23) Lung books are used for respiration in :
A) Spiders *
B) Insects
C) Millipedes
D) Snails

24) The gas produced during tissue respiration can be identified by using :
A) Calcium Hydroxide *
B) Calcium Carbonate
C) Copper Sulphate
D) Sodium Hydroxide

25) Fatigue of leg muscles may occur after riding many kilometers on a bicycle because of :
A) Insufficient Glucose
B) Excess carbondioxide
C) Excess Protein
D) Insufficient oxygen * .

DrBESTJC:
Quick Revision Questions in CHEMISTRY

Answer all 25 questions in 20 minutes !

Test of Speed and Accuracy

Typical UI PostUTME questions

Exam is already here !

1) The filter in a cigarette reduces the nicotine content by... ?
A) adsorption *
B) absorption
C) burning
D) evaporation.

2) What mass of K₂CrO₄ is required to prepare 250cm^3 of 0.020 mol per dm^3 solution...?
A) 97.10g
B) 19.42g
C) 9.70g
D) 0.97g *
[K₂CrO₄ = 194.2g per mol]

3) The type of reaction that is peculiar to Benzene is...?
A) hydrolysis
B) addition
C) substitution *
D) polymerization

4) Carbohydrates are compounds containing carbon, hydrogen and oxygen in the ratio of...?
A) 1 : 1 : 1
B) 1 : 2 : 1 *
C) 2 : 1 : 1
D) 3 : 1 : 1

5) How many isomers does pentane have...?
A) 4
B) 3 *
C) 5
D) 6

6) What volume of gas is evolved at s.t.p. if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid...?
A) 112 cm³
B) 224 cm³
C) 448 cm³ *
D) 2240 cm³
[ Ca = 40, C = 12, O = 16, CL = 35.5, H = 1, Molar volume of a gas at s.t.p. = 22.4 dm³ ]

7) According to Charles's law, the volume of a gas becomes zero at...?
A) 0 degrees centigrade
B) -100 degrees centigrade
C) -273 degrees centigrade *
D) -373 degrees centigrade

8 ) A given volume of methane diffuses in 20seconds. How long will it take the same volume of sulphur(IV)oxide to diffuse under the same conditions...?
A) 5 seconds
B) 20 seconds
C) 40 seconds *
D) 60 seconds
[C = 12, H = 1, S = 32, O = 16]

9) Chlorine consisting of two isotopes of mass numbers 35 and 37 in the ratio of 3:1 has an atomic mass of 35.5. Calculate the relative abundance of the isotope of mass number 37.
A) 20
B) 25 *
C) 60
D) 75

10) The oxidation state of chlorine in HCLO₄ is...?
A) -5
B) -1
C) 1
D) 7 *

11) Which of these compounds is a normal salt...?
A) NaHS
B) NaHSO₄
C) NaHCO₃
D) Na₂CO₃ *

12) Which of the following acts as both a reducing and an oxidizing agent...?
A) H₂
B) SO₂ *
C) H₂S
D) CO₂

13) In the electrolysis of brine, the anode is...?
A) platinum
B) copper
C) zinc
D) carbon *

14) The solubility in mol per dm³ of 20g of CuSO₄ dissolved in 100g of water at 180 degrees Centigrade is...?
A) 0.13
B) 0.25
C) 1.25 *
D) 2.00

15) The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830 seconds is...?
A) 108.0g
B) 54.0g *
C) 27.0g
D) 13.5g
[Ag = 108, F = 96500 C mol^-1 ]

16) The allotrope of carbon used in the decolourization of sugar is ...?
A) graphite
B) soot
C) charcoal *
D) Lampblack

17) Sulphur (IV) oxide bleaches by...?
A) reduction *
B) oxidation
C) hydration
D) adsorption.

18 ) Vulcanization involves the removal of ...?
A) a monomer
B) the single bond
C) the double bond *
D) a polymer

19) CH₃COOH _(g) ----> CH_4(g) + CO_2(g)
The reaction above is...?
A) Carboxylation
B) decarboxylation *
C) acidification
D) esterification

20) Alkanol + Alkanoic acid <---(gives reversibly)---> Ester + Water.
The reverse reaction of the equation above is known as...?
A) hydrolysis *
B) saponification
C) hydration
D) fermentation.

21) In the production of soap,concentrated sodium chloride solution is added to...?
A) increase the solubility of the soap
B) decrease the solubility of the soap *
C) saponify the soap
D) emulsify the soap.

22) The property used in the industrial preparation of nitrogen and oxygen from air is...?
A) rate of diffusion
B) solubility
C) density
D) boiling point *

23) A dense white fume is formed when ammonia reacts with...?
A) Hydrogen gas
B) Oxygen gas
C) Hydrogen Chloride gas *
D) Chlorine gas

24) Aluminium hydroxide is used in the dying industry as a...?
A) salt
B) dye
C) mordant *
D) dispersant.

25) The most suitable metal that can be used as a lightning conductor is...?
A) aluminium
B) iron
C) copper *
D) silver.

Eben331:
Bro, I can't see the corrections to your biology and chemistry questions on my phone. Try to use signs to represent the correct answers or write it in capital letter.

Aceed:


A piece of copper ball of mass 20g at 200c
is placed in a copper calorimeter of mass
60g containing 50g of water at 30c,
ignoring heat losses, calculate the final
steady temperature of the mixture.
(shc of water = 4.2JgK)

Eben331:
I no be baba! You can check the helpdesk contact on the school website.

DrBESTJC:

I hope you can now see the corrections clearly?

esivue007:
i think d news dat was posted here by sulegee has did it all couple wit d info dat i got frm ui

esivue007:
@drbest jc,i think it will be right if u post d glycolysis question in d medical thread

Aceed:


The enzyme of the glycolytic pathway 
is located in the?
(a)mitochondria 
(b) golgi apparatus 
 (c) cytoplasm 
(d) Nucleus


Eben331:
Someone should please help me with this question. Plsssssssssss...

Gracy3535:

That question.... No be here o.
Whats d final answer?
But ve sent d question to dammy

Eben331:
A resonance tube is 40cm long. The tube is three-quarter full. What is the frequency of the turning fork placed near the mouth of the tube? (velocity of sound in air=334m/s) (A) 2511Hz (B) 1670Hz (C) 835Hz (D) 345Hz PLS SHOW YOUR WORKINGS!!

Eben331:
Tell Damayogenius18 to come to Nairaland, it is not all of us that have access to WhatsApp. You also should visit Nairaland often.

DrBESTJC:


Yesooooo.......na here e dey happen. Everybody should come to nairaland abeg.

Facebook I know, Nairaland I know,..........Who be Whatsapp

Gracy3535:

even me its nt everytime i ve mb to access whatsapp..
U guyz shuld give me ur facebook ID

BiafranDel:
babe holla me. I just feel like to subscribe for you.

Gracy3535:
lol wats ur ID na

BiafranDel:
text me yours. lemme add you up. I can't access my mails.

Gracy3535:

even me its nt everytime i ve mb to access whatsapp..
U guyz shuld give me ur facebook ID

Eben331:
You can dm me for my facebook ID. I just want to remain secretive.

BiafranDel:


the full length,L of the tube=40cm=0.4m.

It is 3 quarter filled with water i.e 0.4*3/4= 0.3m which is the length of water.

To find the length of air we say, length of tube - length of water i.e 0.4 - 0.3= 0.1m.

for a closed pipe. fundamental frequency F= velocity/wavelength(4l)

where vel= 334m/s, wavelength= 4L i.e 4*0.1= 0.4m.

Therefore frequency = 334/0.4, frequency= 835hertz. D

Gracy3535:

Grace Adeniyi
am puttin on red headgear & yellow top (facebook)

Eben331:
Bro, the answer that was gotten was 2511Hz. I don't knw how they come abt it.

BiafranDel:
okay. Post the calculation let me see

Eben331:
Someone send the question to me.

BiafranDel:
okay. Tell the person to send the workings.

Eben331:
A resonance tube is 40cm long. The tube is three-quarter full. What is the frequency of the turning fork placed near the mouth of the tube? (velocity of sound in air=334m/s) (A) 2511Hz (B) 1670Hz (C) 835Hz (D) 345Hz PLS SHOW YOUR WORKINGS!!

Eben331:
The person couldn't solve it, dat's why he sent it to me.