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Recent questions tagged sec-a
Questions
Write the scientific name of the free living non pathogenic nematode used in Genomic Project study.
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
What are the hotspots of DNA?
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
List 2 significant contribution of Kornberg in the field of Genetics.
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Why do RNA viruses have high evolution rate?
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Which property of base pair sequences is exploited and applied in genetic engineering and biotechnology?
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
What is the latest interest in human genomics ?
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
If a double stranded DNA has 40% guanine calculate the % of adenine in the DNA.
cbsc
class 12
biology
molecular basis of inheritance
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Why does 'Swiss-cheese' contain large holes?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Microbes release gases during metabolism. How will it help in the production of energy?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Why are some microbes useful in detergent formulation?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Antibiotics are always sold in combination with lactobacillus. Why?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
The excreta of cattle do not contain any cellulose but human excreta may contain cellulose. Why?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
How do lactic acid bacteria help in increasing the nutritional quality of curd?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
On fermentation the dough of idli and dosa puffs up. Which metabolic pathway is responsible for this process?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Consuming curd keeps the gastro-intestinal tract in tact. Give reason.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
A small amount of curd was added to cold milk for converting it into curd. But milk did not get curdled. Why?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Scientists have succeeded in introducing toxin gene of Bacillus thuringiensis into plants like cotton. What purpose is achieved through this action?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
An organic farmer requires a bio control agent which is species specific and has no negative impact on non-target organism. Suggest the name of such a bio control agent.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Which one of these is a proteinaceous infecting agent?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Bottled juices are clearer compared to homemade juice. Give reason.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Can we imagine a world without antibiotics? Explain briefly.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Drinks like Whisky and Rum are more intoxicating than wine. Why?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the type of association that the genus Glomus exhibits with higher plants.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Which of the following is a cyanobacterium that can fix atmospheric nitrogen ? <br> Azospirillum, Oscillatoria, Spirulina.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Which of the following is a free-living bacterium that can fix nitrogen in the soil? <br> Spirulina, Azospirillum, Sonalika.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Why is sewage water treated until the BOD is reduced? Give a reason.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Milk starts to coagulate when Lactic Acid Bacteria (LAB) is added to warm milk as a starter. Mention any two other benefits which LAB provide.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Mention the information that the health workers derive by measuring BOD of a water body.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Mention the role of cyanobacteria as a biofertiliser.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
What makes the nucleopolyhedrovirus a desirable biological control agent?
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the gas released and the process responsible for puffing up of the bread dough when Saccharomyces cerevisiae is added to it.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the nutrient that gets enhanced while curdling of milk by Lactobacillus.
cbsc
class 12
biology
microbes in humans welfare
sec-a
asked
Apr 17, 2019
by
priyanka.clay6
1
answer
Name the important mammary gland secretions that help in resistance of the new born baby.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Zygote undergoes mitosis to form 16 celled stage of embryo. What is it known as?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Name the outermost layer of the blastocyst.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
What is the main function of Sertoli cells ?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Name the site of fertilization in human beings.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Name the structures which secrete estrogen.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Name the structure which secretes progesterone.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
What does the head of a sperm consists of ?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Name the cells which secrete androgens.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
In ovary which part becomes copus luteum and name the hormone secreted by corpus luteum.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
How many sperms will be produced from 10 primary spermatocytes and eggs from 10 primary oocytes?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Not all copulations result in pregnancy. Give a reason.
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Sometimes the doctor injects some medicine into the body of a woman to induce uterine contractions and delivery. What do you think that the doctor has injected?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Why is colostrum essential for an infant?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Name the developmental stage in humans which gets implanted in uterine wall?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
How many autosomes and allosomes are found in a single matured human sperm?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
Why is cleavage in a mammalian zygote referred to as holoblastic?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
A spermatogonial cell has 30 chromosomes. How many chromosomes will be formed in <br>a) The primary spermatocyte <br> b) a spermatid derived from the cell ?
cbsc
class 12
biology
human reproduction
sec-a
asked
Apr 16, 2019
by
priyanka.clay6
1
answer
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