SAT (Stage-2) Mock Test - 16

Some metals like Al and Zn react with both acids and strong alkalies to form salt and hydrogen gas.

Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)

Zn(s) + 2NaOH(aq) → Na₂ZnO₂(aq) + H₂(g)

Both sentences A and B are correct and sentence A explains sentence B. Collenchyma is found in stalks where mechanical strength as well as elasticity is desired. Thus, collenchyma provides mechanical strength as well as elasticity to stalks.

PPLO or Pleuro Pnemonia Like Organism is the smallest known cell. It is resistant to antibiotics and causes a kind of pneumonia in humans.

The eye ball is moved by 6 muscles.
Four of the extraocular muscles control the movement of the eye in the four cardinal directions - up, down, left and right. The remaining two muscles control the adjustments involved in counteracting head movement. This can be observed by looking into one's own eyes in a mirror while moving one's head.

Respiration is accomplished in arthropods by book lungs, tracheae and gills.

Organisms of kingdom Plantae have indefinite growth. Historically, all organisms known were grouped into only two kingdoms. Organisms that had finite growth, moved and ate were grouped into the kingdom Animalia. Organisms that had indefinite growth, did not move and did not eat were grouped into the kingdom Plantae.

Alternative forms of the gene are called alleles. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.

Malic acid has the highest RQ and its value is 1.33.

Riboflavin is essential for normal vision. It is needed to help the body change vitamin B6 and folate into forms it can use. It is also important for growth and red blood cell production.

Egg represents the female gamete of angiosperms. Female gametophyte formation is required for sexual and asexual seed development in angiosperms.

This is the correct option. Heart attack is a disease caused by intrinsic factors. It is caused due to the malfunctioning of body parts.

This is the correct answer. The first step to develop a disease resistant variety is to select the correct variety for breeding.

The maximum amount of DDT accumulates in the body of birds feeding on fish due to their later sequential order in the food chain. It is an example of biological magnification.

If volatile organic compounds (VOCs) are present in the atmosphere, the equation changes entirely. Highly reactive VOCs oxidise nitrogen oxide into nitrogen dioxide, without breaking down any ozone molecules in the process. This leads to a proliferation of ozone near ground level and dense smog formation.

This is the correct option as nitrosomonas plays the role of nitrification in the nitrogen cycle. It converts ammonia into nitrites and then into nitrates.