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The red colour of the red sea is because of-
General Science Biology Class 12th
Q. 1 of Quiz-966 (Que-ID : 1710)
The red colour of the red sea is because of-
- Red Algae
- Brown algae
- Cephaleuros
- Trichodesmium erithraeum
Ans → (d)Trichodesmium erithraeum
Explanation → Trichodesmium erithraeum is a species of cyanobacteria that are Blue-green Algae also called sea sawdust. The red colour predominates due to the excess of C-Phycoerythrin in these algae.
This question is taken from this post → Basics of Biology MCQs Practice Test #1 | General Science quiz - attemp/practice
More MCQs in - Basics of Biology MCQs Practice Test #1 | General Science quiz
Q. 1 of Quiz-966 (Que-ID : 1710)
The red colour of the red sea is because of-
- Red Algae
- Brown algae
- Cephaleuros
- Trichodesmium erithraeum
Q. 2 of Quiz-966 (Que-ID : 1711)
The age of the tree can be calculated by-
- counting number of branches
- measuring its girth
- counting the number of annual rings
- measuring its height
Q. 4 of Quiz-966 (Que-ID : 1713)
Which is collip's hormone?
- Thyroxine
- Parathormone
- Insulin
- Esterogen
Q. 5 of Quiz-966 (Que-ID : 1714)
Stomata are bound by a pair of guard cells. Stomata close when guard cells become-
- Turgid
- flacid
- half flacid
- small
Q. 6 of Quiz-966 (Que-ID : 1715)
Which of the following can be used for the biological control of musquitoes?
- Oil
- DDT
- Gamaxene
- Gambusia
Q. 7 of Quiz-966 (Que-ID : 1716)
Disease transmitted by the head louse is-
- Plague
- rabies
- typhoid
- scurvy
Q. 9 of Quiz-966 (Que-ID : 1718)
The science dealing with the fossil plants-
- Palaeobotany
- Geology
- Epistemology
- Entomology
Q. 10 of Quiz-966 (Que-ID : 1719)
The organism that lives at the cost of another living organism is called-
- Aphrodite
- saprophyte
- epiphyte
- parasite
More MCQs In - General Science Biology Class 12th
Q. 11 of Quiz- (Que-ID : 3104)
Oxygen scavangers present in root nodules of legumes is
- haemoglobin
- leg haemoglobin
- cyano haemoglobin
- none of these
Q. 13 of Quiz- (Que-ID : 3406)
DNA element with ability to change its position is called
- Cistron
- Transposon
- Intron
- Ricon
Q. 21 of Quiz- (Que-ID : 3389)
Which of the following bacteria is present in the rumen of cattle ?
- Azotobacter
- Rhizobium
- Methanobacterium
- Azospirillum
Q. 4 of Quiz- (Que-ID : 3322)
Typhoid fever in human beings is caused by
- Plasmodium vivax
- Trichophyton
- Salmonella typhi
- Rhinoviruses
Q. 17 of Quiz- (Que-ID : 3560)
Which of these is not a Linear polymer?
- Starch
- Polyethelene
- Nylons
- Polysters
Q. 15 of Quiz- (Que-ID : 3033)
Which growth hormone accerlates the malting process in brewing industry?
- Auxins
- Gibberellins
- Ethylene
- Cytokinins
Q. 20 of Quiz- (Que-ID : 3463)
Submerged hydrophytes have disseced leaves for
- Decreasing surface area
- Increasing surface area
- Reducing effect pf water currents
- Increasing number of stomata
Q. 20 of Quiz- (Que-ID : 2989)
ANF can cause
- Vasoconstriction
- Vasodilation
- Both a and b
- None of the above
Q. 1 of Quiz- (Que-ID : 2869)
IUDs prevent pregnancy by
- inhibiting physiological and morphological uterine changes required for implantation
- increasing phagocytosis of spermatozoa within uterus
- suppressing motility of sperms as well as their fertilising capacity
- all of these
Q. 2 of Quiz- (Que-ID : 3070)
The end product of the Calvin cycle is ______.
- RuBP
- PGAL
- PGA
- ADP + NADP
Q. 13 of Quiz- (Que-ID : 2706)
Which among the following are involuntary muscles
- Cardiac
- Skeletal
- Smooth
- Both a and c
Q. 3 of Quiz- (Que-ID : 2921)
What will be the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus ?
- 3:01
- 1:02:01
- 1:01
- None of the above
Q. 10 of Quiz- (Que-ID : 3328)
A toxic substance, responsible for the chills and high fever recurring every three to four days in malarial fever, is
- interferon
- haemozoin
- hirudin
- colostrum
Q. 10 of Quiz- (Que-ID : 3478)
Physical and chemical properties of soil studied by
- Climatic factor
- Biotic factor
- Soil factor
- Topographic factor
Q. 23 of Quiz- (Que-ID : 3391)
Biogas is produced by
- aerobic breakdown of biomass
- anaerobic breakdown of biomass
- with the help of methanogenic bacteria
- both (b) and (c)
Q. 15 of Quiz- (Que-ID : 3383)
The purpose of biological treatment of waste water is to
- reduce BOD
- increase BOD
- reduce sedimentation
- increase sedimentation
Q. 11 of Quiz- (Que-ID : 3379)
Enzyme which has the fibrinolytic effect is
- protease
- amylase
- lipase
- streptokinase
Q. 15 of Quiz- (Que-ID : 2833)
There is no natural death in single celled organisms like Amoeba and bacteria because
- they cannot reproduce sexually
- they reproduce be binary fission
- parental body is distributed among the offspring
- they are microscopic.
Q. 23 of Quiz- (Que-ID : 3291)
By which type of leaf is found in selaginella
- Aligulate and microphyllous
- Ligulate and megaphyllous
- Ligulate and microphyllous
- Aligulate and megaphyllous
Q. 15 of Quiz- (Que-ID : 3358)
MOET stands for
- Multiple Ovulation and Egg transfer Technology
- Multiple Ovary and Embryo Transfer Technology
- Multiple Ovulation Embryo Transfer Technology
- Method of Egg Transfer Technology
Q. 18 of Quiz- (Que-ID : 3336)
The term ‘antitoxin’ refers to a preparation containing
- B-lymphoctyes and T-lymphocytes
- antibodies to the toxin
- weakend pathogen
- inactivated T-lymphocytes.
Q. 25 of Quiz- (Que-ID : 2693)
What condition occurs when not enough oxygen reaches heart muscle
- High bp
- Low bp
- Angina
- Heart failure
Q. 4 of Quiz- (Que-ID : 1414)
Which one is a permanent contraceptive method?
- Male sterilization
- Barrier method
- Intra - Uterine devices
- Hormonal methods
Q. 10 of Quiz- (Que-ID : 2978)
Each kidney has how many nephrons
- 1 million
- 2 million
- 2 thousand
- 2 hundred
Q. 13 of Quiz- (Que-ID : 3531)
Minimata disease is caused by
- ByChromium
- By Cadmium
- By Methyl mercury
- By Radioactive elements
Q. 19 of Quiz- (Que-ID : 3362)
The term ‘apiculture’ refers to
- tissue culture
- pisciculture
- bee-keeping
- animal-keeping
Q. 20 of Quiz- (Que-ID : 3113)
NPK denotes
- Nitrogen, Protein, Kinetin
- Nitrogen, Protein, Potassium
- Nitrogen, Potassium, kinetin
- Nitrogen, Phosphorus, Potassium
Q. 16 of Quiz- (Que-ID : 3484)
Kanha National Park is famous for
- For Birds
- For Tendua
- For Tiger
- For Crocodile
Q. 1 of Quiz- (Que-ID : 2994)
Golgi complex and endoplasmic reticulum cannot be seen during
- late telophase
- late prophase
- early anaphase
- late metaphase
Q. 2 of Quiz- (Que-ID : 3545)
Which compound of mercury is used as antiseptic?
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Which of the following acts as mobile carrier for transfer of electrons between complex III and complex IV?
- Cytochrome c
- cytochrome a3
- cytochrome a
- FADH2
Q. 8 of Quiz- (Que-ID : 2726)
Common feature of archaebacteria
- Structure of cell membrane
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Q. 11 of Quiz- (Que-ID : 2904)
Preparation of sperm before penetration of ovum is
- spermiation
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Q. 11 of Quiz- (Que-ID : 3179)
The ciliated epithelium in our body may be found in
- trachea
- ureter
- bile duct
- intestines
Q. 20 of Quiz- (Que-ID : 3063)
One molecule of glucose yields ___ ATP molecules in aerobic respiration.
- 2
- 16
- 38
- 42
Q. 4 of Quiz- (Que-ID : 2897)
Which one of the following events is correctly matched with the time period in a normal menstrual cycle ?
- Release of egg : 5 th day
- Endometrium regenerates : 5 – 10 days
- Endometrium secretes nutrients for implantation: 11 – 18 days
- Rise in progesterone level : 1 – 15 days
Q. 15 of Quiz- (Que-ID : 2958)
In DNA strand, the nucleotides are linked together by
- glycosidic bonds
- phosphodiester bonds
- peptide bonds
- hydrogen bonds
Q. 18 of Quiz- (Que-ID : 2836)
The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the microspore mother cells of the same plant shall be
- 20
- 10
- 40
- 15
Q. 25 of Quiz- (Que-ID : 2918)
At what stage of life is oogenesis initiated in a human female ?
- At puberty
- During menarch
- During menopause
- During embryonic development
Q. 2 of Quiz- (Que-ID : 2920)
The characters which appear in the first filial generation are called
- recessive characters
- dominant characters
- holandric characters
- lethal characters
Q. 2 of Quiz- (Que-ID : 559)
In the visible spectrum the colour having t he shortest wavelength is-
In the visible spectrum the colour having t he shortest wavelength is-
- Violet
- blue
- yellow
- Red
Q. 14 of Quiz- (Que-ID : 2983)
Kidney transplantation is the ultimate method of correction in which case
- Renal calculi
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- Uremia
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