List of practice Questions

Which among these is the correct combination of aquatic mammals?

GnRH, a hypothalamic hormone, needed in reproduction, acts on

Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements:

1. Vitamin A derivatives are formed from carotene .
2. The photopigments are embedded in the membrane discs of the inner segment.
3. Retinal is a derivative of vitamin A.
4. Retinal is a light absorbing part of all the visual photopigments.

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

Which of the following options best represents the enzyme composition of pancreatic juice?

Which of the following in sewage treatment removes suspended solids?

The water potential of pure water is

Which one of the following statements is correct, with reference to enzymes?

Mycorrhizae are the example of

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :

Frog's heart when taken out of the body continues to beat for some time.
Select the best option from the following statements:

1. Frog is a poikilotherm
2. Frog does not have any coronary circulation
3. Heart is "myogenic" in nature 
4. Heart is autoexcitable

Which statement is wrong for Krebs' cycle?

The DNA fragments separated on an agarose gel can be visualised after staining with

Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:

Identify the wrong statement in context of heartwood.

A dioecious flowering plant prevents both:

The DNA double helix is exposed

A gene whose expression helps to identify transformed cell is known as

Asymptote in a logistic growth curve is obtained when

In Bougainvillea thorns are the modifications of

Which one from those given below is the period for Mendel's hybridization experiments?

Artificial selection to obtain cows yielding higher milk output represents

Select the correct route for the passage of sperms in male frogs :

The function of copper ions in copper releasing IUD's is :

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.