1. What do we call the roots of some orchid plants, which hang in the air and absorb moisture from it?
[A] Assimilatory Roots
[B] Epiphytic Roots
[C] Sucking Roots
[D] Stilt Roots
Show Answer
Correct Answer: B [ Epiphytic Roots]
Notes:
Epiphytic roots are the roots of some orchid plants, which hang in the air and absorb moisture and nutrients from the air, rain water. Examples of epiphytic roots are mosses, liverworts, lichens, and algae of temperate zone and ferns, cacti, orchids, and bromeliads in the tropics.
2. What is the primary role of lipids in the body?
[A] provide energy for muscles and body processes
[B] maintain normal blood volume and normal water content in interstitial fluid
[C] extract waste from blood, balance body fluids, form urine
[D] produce certain proteins for blood plasma
Show Answer
Correct Answer: A [ provide energy for muscles and body processes]
Notes:
The primary role of lipids in the body is to provide energy for muscles and body processes.
3. The cells of all living biological matter are made of four major elements. The elements are:
[A] Carbon, Hydrogen, Oxygen and Phosphorous
[B] Carbon, Hydrogen, Oxygen and Nitrogen
[C] Carbon, Hydrogen, Oxygen and Sulphur
[D] Sodium, Chlorine, Potassium and Magnesium
Show Answer
Correct Answer: B [ Carbon, Hydrogen, Oxygen and Nitrogen]
Notes:
The four major elements are Carbon, Hydrogen, Oxygen and Nitrogen.
4. Which hormones does pancreas secret?
[A] Testosterone
[B] Progesterone
[C] Prolactin
[D] Glucagon and insulin
Show Answer
Correct Answer: D [Glucagon and insulin]
Notes:
The Islets of Langerhans are the endocrine cells of the pancreas that produce and secrete hormones such as insulin and glucagon into the bloodstream. The pancreatic hormones, insulin and glucagon, work together to maintain the proper level of sugar (glucose) in the blood.
5. Which plants grow well only in light?
[A] Heliophytes
[B] Xerophytes
[C] Sciophilous
[D] Epiphytes
Show Answer
Correct Answer: A [Heliophytes]
Notes:
Sunstroke plants or heliophytes are adapted to a habitat with a very intensive insolation, because of the construction of its own structure and maintenance. Heliophytes, for example, are mullein, ling, thyme and soft velcro, white clover, and most roses.
6. Which of the following is a fibrous protein?
[A] Enzymes
[B] Keratin
[C] Haemoglobin
[D] Albumin
Show Answer
Correct Answer: B [Keratin]
Notes:
Keratin is a group of fibrous proteins occurring in hair, feathers, hooves, and horns. Keratins have coiled polypeptide chains that combine to form supercoils of several polypeptides linked by disulphide bonds between adjacent cysteine amino acids.
7. Which of the following at the opposite of micropylar end represents the basal part of the ovule?
[A] Hilum
[B] Nucellus
[C] Chalaza
[D] Funicle
Show Answer
Correct Answer: C [Chalaza]
Notes:
The chalaza is a structure inside bird and reptile eggs and plant ovules. It attaches or suspends the yolk or nucellus within the larger structure. It represents the basal part of the ovule.
8. What is the full form of DNA?
[A] Deoxyribonucleic acid
[B] Di nucleic acid
[C] Diribo nucleic acid
[D] Dual nitrogen acid
Show Answer
Correct Answer: A [Deoxyribonucleic acid]
Notes:
The full form of DNA is deoxyribonucleic acid. DNA is a molecule that carries the genetic instructions used in the development and function of all living organisms and some viruses. It is a double-stranded, helical molecule made up of nucleotide units, each of which contains a sugar, a phosphate group, and a nitrogenous base (adenine, guanine, cytosine, or thymine). The sequence of these bases determines the genetic information that is stored in DNA, and this information is passed down from one generation to the next through the process of reproduction.
9. Epiphytes are plants which depend on other plants for?
[A] food
[B] mechanical support
[C] shade
[D] water
Show Answer
Correct Answer: B [mechanical support]
Notes:
They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively.
10. Which among the following is responsible for the red colour of blood?
[A] Haemoglobin
[B] Platelets
[C] Plasma
[D] None of the above
Show Answer
Correct Answer: A [Haemoglobin]
Notes:
Haemoglogin pigment is responsible for the red colour of the blood. Haemoglobin is responsible for carrying oxygen from lungs to the tissues of the body.
