Biology - Online Test
Q1. Which among the five kingdom system of classification do not possess nuclear membrane?
Answer : Option A
Explaination / Solution:
Kingdom Protista, kingdom Fungi, kingdom Plantae possess nuclear membrane while kingdom Monera do not possess nuclear membrane.
Q2. By chemical nature, hormones are never :
Answer : Option A
Explaination / Solution:
Hormones are generally protein components having amino acids as well as steroids. Hormones are generally not monosaccharide derivatives in nature.
Q3. Which of the following is/are poikilotherm:
Answer : Option C
Explaination / Solution:
The organisms that can change their body temperature according to environment are called poiklotherm or cold blooded animals. Tapeworm and naked mole rat are examples of cold blooded animals.
Q4. Which is an important constituent of protein involved in transfer of electrons?
Answer : Option D
Explaination / Solution:
Plants obtain iron in the form of ferric ions (Fe3+). It is required in larger amounts in comparison to other micronutrients. It is an important constituent of proteins involved in the transfer of electrons like ferredoxin.
Q5.
Complete the following reaction :
- Maltose — Maltase → Glucose + i
- Lactose — Lactase → Glucose + ii
- Sucrose — Sucrase → Glucose + iii
Answer : Option D
Explaination / Solution:
Maltose in presence of maltase produce two molecules of glucose. Lactose in presence of lactase produce glucose and galactose. Sucrose in presence of sucrose produce glucose and fructose.
Q6. Motile zygote of Plasmodium occurs in
Answer : Option C
Explaination / Solution:
Plasmodium completes their life cycle in two hosts, female anopheles and human beings. The motile zygote of plasmodium occurs in gut of female anopheles, which get transferred to human being during mosquito bite.
Q7. In the prosencephalon, first and second ventricles open into third ventricle by :
Answer : Option D
Explaination / Solution:
In prosencephlon, the first and second ventricles open into third ventricles by foramen of Monro. It is the opening that connects the left and right sides of lateral ventricle in brain.
Q8. Kelps are
Answer : Option D
Explaination / Solution:
Kelps are marine algae of class phaeophyceae or brown algae. The body of kelp may reach upto 100 meter long. They vary in colour from olive green to various shades of brown depending upon xanthophyll pigments , fucoxanthin present in them.
Q9. Who first saw and described a live cell?
Answer : Option B
Explaination / Solution:
The first man to witness a live cell under a microscope was Anton van Leeuwenhoek, who in 1674 described the algae Spirogyra. Van Leeuwenhoek probably also saw bacteria.
Q10. Name the conjugated protein used as genetic material in living cells
Answer : Option D
Explaination / Solution:
Nucleoprotein, conjugated protein consisting of a protein linked to a nucleic acid, either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). The protein combined with DNA is commonly either histone or protamine; the resulting nucleoproteins are found in chromosomes.
