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- Question
The grouping of blood is based on substances called
Options- A. antibodies
- B. antigens
- C. antitoxin
- D. enzymes
- Correct Answer
- antigens
ExplanationThe red blood corpuscles or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.
- 1. Organisms which synthesise their own food are called
Options- A. autotrophs
- B. heterotrophs
- C. auxotrophs
- D. saprotrophs Discuss
- 2. Organisms that feed on the excreta of other organisms are called
Options- A. autotrophs
- B. heterotrophs
- C. coprophagous
- D. saprotrophs Discuss
- 3. Which observation proves that a cell is a eukaryote?
Options- A. It contains DNA
- B. It contains ribosomes
- C. It has a cell membrane
- D. It has DNA inside a nucleus Discuss
- 4. The normal blood pressure in human beings is
Options- A. 80/120
- B. 120/80
- C. 80/110
- D. 110/90 Discuss
- 5. Sort each description by the type of RNA it describes? a) contains an anticodon b) specifies the amino acid squence for a protein c) contains exons d) has amino acids covalently attached e) is a component of ribosomes f) is the most abundant form of RNA
Options- A. a, b, d - tRNA, c - mRNA, e, f - rRNA
- B. a, c - tRNA, b, d - mRNA, e, f - rRNA
- C. a, e, f - rRNA, b - mRNA, c, d - tRNA
- D. None of the above Discuss
- 6. Organisms that live in the deep sea are mainly
Options- A. Herbivores
- B. Carnivores
- C. Detritivores
- D. None of the above Discuss
- 7. Genes are made of
Options- A. Carbohydrates
- B. Proteins
- C. Fats
- D. Nucleotides Discuss
- 8. The book Historia plantrum is written by
Options- A. Aristotle
- B. Theophrastus
- C. Hipporates
- D. Darwin Discuss
- 9. The insects do not have blood pigments because
Options- A. there is no blood
- B. blood does not have a respirratory function
- C. tissues have pigments
- D. pigments are elsewhere Discuss
- 10. In photosynthesis________
Options- A. Light energy is converted into chemical energy
- B. Chemical energy is converted into Light energy
- C. Chemical energy is converted into electrical energy
- D. Light energy is converted into Mechanical energy Discuss
Biology problems
Search Results
Correct Answer: autotrophs
Explanation:
Autotroph: This term means organisms that synthesise their own food. Troph means feeding. Auto means self. The green plants which synthesise their own food are called autotrophs. All others which depend upon the plants directly or indirectly are called heterotrophs.
Correct Answer: coprophagous
Explanation:
The word coprodaeum refers to the last part of the elimentary canal.The excreta (undigested, matter) comes out of that part. So, the organisms that take in such materials are called coprophagous.
Correct Answer: It has DNA inside a nucleus
Explanation:
Eukaryotic cells all have a nucleus. Eukaryotes are organisms that are multicellular, although there are some examples of single cellular eukaryotes. So eukaryotic cells can be either cell with a nucleus or a eukaryotic organism's cell.
The most important feature to judge whether it has nucleus membrane.
And for other choices, they are the common features of eukaryote and prokaryote.
Correct Answer: 120/80
Correct Answer: a, b, d - tRNA, c - mRNA, e, f - rRNA
Explanation:
Option A)
a, b, d - tRNA, c - mRNA, e, f - rRNA
Is the given sorted description that describes the RNA type.
Correct Answer: Detritivores
Explanation:
Deep sea animals cannot produce food as there is no light. They have to depend upon the fall out of organic debirs raining down on them from surface layers. Hence they are detritivores.
Correct Answer: Nucleotides
Explanation:
Genes : The DNA is the genetic material. The DNA is made of several nucleotides. A nucleotide means, one nitrogenous base one sugar molecule and a phosphate molecule. These nucleotides occur in sequences and several nucleotides form one Gene ( a functional mgene is called a cistron)
Correct Answer: Theophrastus
Correct Answer: blood does not have a respirratory function
Explanation:
The blood of some invertebrate animals like the earthworm is red due to haemoglobin pigment, but the pigment is dissolved in the plasma. In vertebrates the same pigment is found in the red corpuscles and not in the plasma.
Correct Answer: Light energy is converted into chemical energy
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